{"title":"Automatic Ratchet Blocks","description":"\u003cp\u003eSeldén’s automatic ratchet blocks engage under load to give you powerful holding force when you need it, ideal for sheets on performance sailboats. With smooth rotation when unloaded and secure grip when tensioned, these blocks offer precision, safety, and efficiency in both light and rough racing conditions.\u003c\/p\u003e","products":[{"product_id":"45-mm-automatic-ratchet-block-single-swivel","title":"45 mm Automatic Ratchet Block - Single, Swivel","description":"\u003cp\u003eThe ARB45 Single Swivel Block is a 45 mm ball bearing block with a swiveling shaft. A swivel lock, a plastic washer which is placed between block body and shackle, is included for fixed 0° or 90° shackle position.\u003c\/p\u003e\u003cp\u003eThe block is designed with lightweight ø5 mm Delrin ball bearings and features a composite sheave. The sheave automatically changes from free-turning to ratchet when the load increases. The sailor decides when the automatic ratchet kicks in. The switch-over point is set using an allen key to adjust a screw inside the sheave. Fast, simple, precise.\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003e\u003cb\u003eSafe working Load\u003c\/b\u003e: 150 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eBreaking Load\u003c\/b\u003e: 300 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eMax line size\u003c\/b\u003e: 8 \u003cem\u003emm\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Selden Mast AB","offers":[{"title":"Default Title","offer_id":52634816741709,"sku":"404-401-01R","price":972.5,"currency_code":"SEK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/5701\/8445\/files\/index_05dd75cb-13a9-4b52-8f81-1c935d763ac0.jpg?v=1761137730"},{"product_id":"a60-60-mm-automatic-ratchet-block-single-swiveling-fixed","title":"A60 - 60 mm Automatic Ratchet block, Single, Swiveling\/Fixed","description":"\u003cp\u003eThe automatic A60 ratchet block is designed for dynamic applications on dinghies and keelboats and features a ø60 mm composite sheave. \u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eThe block is designed with lightweight Delrin ball bearings and the sheave automatically changes from free-turning to ratchet when the load increases. The sailor decides when the automatic ratchet kicks in.\u003c\/li\u003e\n\u003cli\u003eThe switch-over point is set using an allen key to adjust a screw inside the sheave. Fast, simple, precise.\u003c\/li\u003e\n\u003cli\u003eA swivel lock, a plastic washer which is placed between block body and shackle, is included for fixed 0° or 90° shackle position.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eSafe working Load\u003c\/b\u003e: 250 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eBreaking Load\u003c\/b\u003e: 500 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eMax line size\u003c\/b\u003e: 10 \u003cem\u003emm\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Selden Mast AB","offers":[{"title":"Default Title","offer_id":52634853933389,"sku":"406-350-51R","price":1400.0,"currency_code":"SEK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/5701\/8445\/files\/index_286b081b-b4fe-4e6b-bc12-fa0b1436a3ed.jpg?v=1761137979"},{"product_id":"a60-60-mm-automatic-ratchet-block-soft-attachment","title":"A60 - 60 mm Automatic Ratchet block, Soft-Attachment","description":"\u003cp\u003eTECHNICAL FEATURES\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eThe block is designed with lightweight Delrin ball bearings and comes with a composite sheave.\u003c\/li\u003e\n\u003cli\u003eThe sheave automatically changes from free-turning to ratchet when the load increases. The sailor decides when the automatic ratchet kicks in.\u003c\/li\u003e\n\u003cli\u003eThe switch-over point is set using an allen key to adjust a screw inside the sheave. Fast, simple, precise.\u003c\/li\u003e\n\u003cli\u003eMade for soft-attachment with a soft-shackle or a Dyneema lashing. \u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eSafe working Load\u003c\/b\u003e: 250 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eBreaking Load\u003c\/b\u003e: 500 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eMax line size\u003c\/b\u003e: 10 \u003cem\u003emm\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Selden Mast AB","offers":[{"title":"Default Title","offer_id":52634853998925,"sku":"406-350-54R","price":1227.5,"currency_code":"SEK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/5701\/8445\/files\/index_072ca872-0513-49ab-99e6-bf8560f733c9.jpg?v=1761137973"},{"product_id":"a60-60-mm-automatic-ratchet-block-cheek-clockwise","title":"A60 - 60 mm Automatic Ratchet Block, Cheek, Clockwise","description":"\u003cp\u003eTECHNICAL FEATURES\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eThe block is designed with lightweight Delrin ball bearings and comes with a composite sheave.\u003c\/li\u003e\n\u003cli\u003eThe Sheave turns freely clockwise. When used as a turning block for spinnaker sheet, fit it on starboard quarter.\u003c\/li\u003e\n\u003cli\u003eThe sheave automatically changes from free-turning to ratchet when the load increases. The sailor decides when the automatic ratchet kicks in.\u003c\/li\u003e\n\u003cli\u003eThe switch-over point is set using an allen key to adjust a screw inside the sheave. Fast, simple, precise.\u003c\/li\u003e\n\u003cli\u003eAttaches with three M5 screws.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eSafe working Load\u003c\/b\u003e: 250 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eBreaking Load\u003c\/b\u003e: 500 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eMax line size\u003c\/b\u003e: 10 \u003cem\u003emm\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Selden Mast AB","offers":[{"title":"Default Title","offer_id":52634854064461,"sku":"406-350-55R","price":1532.5,"currency_code":"SEK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/5701\/8445\/files\/index_af3746c8-e5ef-4377-a62e-3bc52923f54e.jpg?v=1761137975"},{"product_id":"a60-60-mm-automatic-ratchet-block-cheek-anti-clockwise","title":"A60 - 60 mm Automatic Ratchet Block, Cheek, Anti-Clockwise","description":"\u003cp\u003eTECHNICAL FEATURES\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eThe block is designed with lightweight Delrin ball bearings and comes with a composite sheave.\u003c\/li\u003e\n\u003cli\u003eThe Sheave turns freely anti-clockwise. When used as a turning block for spinnaker sheet, fit it on port quarter.\u003c\/li\u003e\n\u003cli\u003eThe sheave automatically changes from free-turning to ratchet when the load increases. The sailor decides when the automatic ratchet kicks in.\u003c\/li\u003e\n\u003cli\u003eThe switch-over point is set using an allen key to adjust a screw inside the sheave. Fast, simple, precise.\u003c\/li\u003e\n\u003cli\u003eAttaches with three M5 screws.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eSafe working Load\u003c\/b\u003e: 250 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eBreaking Load\u003c\/b\u003e: 500 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eMax line size\u003c\/b\u003e: 10 \u003cem\u003emm\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Selden Mast AB","offers":[{"title":"Default Title","offer_id":52634854097229,"sku":"406-350-56R","price":1532.5,"currency_code":"SEK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/5701\/8445\/files\/index_ddb5fc68-3ed4-42bc-ad87-13634dd4388c.jpg?v=1761137977"},{"product_id":"a60-60-mm-automatic-ratchet-block-with-aluminium-sheave","title":"A60+ - 60 mm Automatic Ratchet Block with Aluminium Sheave","description":"\u003cp\u003eThe automatic A60+ ratchet block is designed for dynamic applications on dinghies and keelboats and features a ø60 mm aluminium sheave. Aluminium makes for more grip and the ability to cope with relative thin lines.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eThe block is designed with lightweight Delrin ball bearings and the sheave automatically changes from free-turning to ratchet when the load increases. The sailor decides when the automatic ratchet kicks in.\u003c\/li\u003e\n\u003cli\u003eThe switch-over point is set using an allen key to adjust a screw inside the sheave. Fast, simple, precise.\u003c\/li\u003e\n\u003cli\u003eA swivel lock, a plastic washer which is placed between block body and shackle, is included for fixed 0° or 90° shackle position.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eSafe working Load\u003c\/b\u003e: 250 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eBreaking Load\u003c\/b\u003e: 500 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eMax line size\u003c\/b\u003e: 10 \u003cem\u003emm\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Selden Mast AB","offers":[{"title":"Default Title","offer_id":52634855571789,"sku":"406-360-51R","price":1956.25,"currency_code":"SEK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/5701\/8445\/files\/index_ec25b78f-7c0e-4025-9085-7b393147874a.jpg?v=1761137990"},{"product_id":"a60-60-mm-automatic-ratchet-block-soft-attachment-aluminium-sheave","title":"A60+ - 60 mm Automatic Ratchet Block, Soft-attachment, Aluminium sheave","description":"\u003cp\u003eThe automatic A60+ ratchet block is designed for dynamic applications on dinghies and keelboats and features a ø60 mm aluminium sheave. Aluminium makes for more grip and the ability to cope with relative thin lines.\u003c\/p\u003e\u003cp\u003eTECHNICAL FEATURES\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eThe block is designed with lightweight Delrin ball bearings and comes with a composite sheave.\u003c\/li\u003e\n\u003cli\u003eThe sheave automatically changes from free-turning to ratchet when the load increases. The sailor decides when the automatic ratchet kicks in.\u003c\/li\u003e\n\u003cli\u003eThe switch-over point is set using an allen key to adjust a screw inside the sheave. Fast, simple, precise.\u003c\/li\u003e\n\u003cli\u003eMade for soft-attachment with a soft-shackle or a Dyneema lashing. \u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eSafe working Load\u003c\/b\u003e: 250 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eBreaking Load\u003c\/b\u003e: 500 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eMax line size\u003c\/b\u003e: 10 \u003cem\u003emm\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Selden Mast AB","offers":[{"title":"Default Title","offer_id":52634855735629,"sku":"406-360-54R","price":1717.5,"currency_code":"SEK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/5701\/8445\/files\/index_f66807b8-c8ca-4edf-88d8-d78c370654e0.jpg?v=1761137993"},{"product_id":"arb45-45-mm-automatic-ratchet-block-single-aluminium-sheave-1","title":"ARB45 - 45 mm Automatic Ratchet Block, Single, Aluminium sheave","description":"\u003cp\u003eAPPLICATIONS\u003cbr\u003eDinghy main sheets.\u003cbr\u003eDinghy spinnaker\/Gennaker sheets \u003c\/p\u003e\u003cp\u003e\u003cbr\u003eTECHNICAL FEATURES\u003c\/p\u003e\u003cp\u003eThe block is designed with lightweight Delrin ball bearings and comes with an aluminium sheave for more grip when using it for a thin line. \u003cbr\u003eThe sheave automatically changes from free-turning to ratchet when the load increases. The sailor decides when the automatic ratchet kicks in.\u003cbr\u003eThe switch-over point is set using an allen key to adjust a screw inside the sheave. Fast, simple, precise.\u003cbr\u003eThe shackle is either swiveling or locked in 0°\/90°. A swivel lock 404-131 is included when purchasing the block. \u003c\/p\u003e\u003cp\u003e\u003cb\u003eSafe working Load\u003c\/b\u003e: 150 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eBreaking Load\u003c\/b\u003e: 300 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eMax line size\u003c\/b\u003e: 8 \u003cem\u003emm\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Selden Mast AB","offers":[{"title":"Default Title","offer_id":55077180834125,"sku":"404-360-51R","price":1107.5,"currency_code":"SEK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/5701\/8445\/files\/index_7067ba4d-b298-4f3b-8bab-ca0ae320f50c.jpg?v=1792137329"}],"url":"https:\/\/shop.seldenmast.com\/collections\/blocks-ratchet-blocks-automatic.oembed","provider":"Seldén Yacht Store SE","version":"1.0","type":"link"}