{"product_id":"harken-3405-1-ton-twing-block-2-205-lb-working-load","title":"Harken 3405 1 Ton Twing Block, 2,205 lb Working Load","description":"\u003cp\u003e\u003cstrong\u003e1 Ton Twing Block\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Twing block features a spring-loaded side opening mechanism for true one-handed rigging, even while wearing sailing gloves. Black anodized aluminum sideplates are edged with robust bumpers to protect the block, topsides, and deck. The sheave is aluminum rolling on a bearing system shared with Harken's existing 2.3T high-load snatch block.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSide opening side plate - Easy to rig and remove from sheet\u003c\/li\u003e\n\u003cli\u003eSpring loaded button release - Quick one-handed rigging\u003c\/li\u003e\n\u003cli\u003eAnti-capsize bar - Keeps sheave aligned on sheet\u003c\/li\u003e\n\u003cli\u003eULC main bearing - Sheave turns smoothly under extreme loading\u003c\/li\u003e\n\u003cli\u003eSideload balls - Carry loads especially when the block is not aligned in light air\u003c\/li\u003e\n\u003cli\u003eThimble at pivot base - Use 1:1 or 2:1 up-down control\u003c\/li\u003e\n\u003cli\u003eMachined aluminum inner sideplates - High strength, low weight\u003c\/li\u003e\n\u003cli\u003eSoft polyurethane outer side plate bumpers - Protects block and deck\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eUses:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTwing, tweaker control for code zero sheets\u003c\/li\u003e\n\u003cli\u003eCan be used as a snatch block when combined with a soft shackle\u003c\/li\u003e\n\u003cli\u003eSpinnaker sheet and guy control \u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSheave  (mm): 38.5 mm\u003c\/li\u003e\n\u003cli\u003eSheave  (in): 1-1\/2 in\u003c\/li\u003e\n\u003cli\u003eMaximum line  (mm): 11 mm\u003c\/li\u003e\n\u003cli\u003eMaximum line  (in): .43 in\u003c\/li\u003e\n\u003cli\u003eMaximum working load (kg): 1000 kg\u003c\/li\u003e\n\u003cli\u003eMaximum working load (lb): 2205 lb\u003c\/li\u003e\n\u003cli\u003eBreaking load (kg): 2000 kg\u003c\/li\u003e\n\u003cli\u003eBreaking load (lb): 4409 lb\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003eThe Harken 3405 1 Ton Twing Block is a high-load sailing block designed for one-handed rigging of twing, tweaker, spinnaker sheet, and guy-control systems. Its spring-loaded side-opening mechanism makes it easier to rig or remove from a sheet while wearing sailing gloves, while the aluminum construction delivers a strong, lightweight solution for demanding onboard line-control applications.\u003c\/p\u003e\u003cp\u003eBuilt for reliable performance under heavy loading, the block combines an aluminum sheave with a bearing system shared with Harken's 2.3T high-load snatch block. The anti-capsize bar helps keep the sheave aligned on the sheet, while sideload balls support loads when the block is not aligned in light air. A thimble at the pivot base enables either 1:1 or 2:1 up-down control, adding flexibility for different rigging arrangements.\u003c\/p\u003e\u003cp\u003eThe Harken 3405 can also be used as a snatch block when combined with a soft shackle. Black anodized aluminum sideplates provide strength and reduced weight, while soft polyurethane outer bumpers help protect the block, topsides, and deck during use. With a maximum working load of 2,205 pounds and a breaking load of 4,409 pounds, this Harken 1 Ton Twing Block is suited for sailors who need dependable control of high-load sheets and running rigging.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring-loaded side opening:\u003c\/strong\u003e Enables quick, one-handed rigging and sheet removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnti-capsize bar:\u003c\/strong\u003e Helps keep the sheave aligned on the sheet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eULC main bearing:\u003c\/strong\u003e Supports smooth sheave rotation under extreme loading.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSideload balls:\u003c\/strong\u003e Carry loads when the block is not aligned in light air.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtective bumpers:\u003c\/strong\u003e Soft polyurethane outer sideplate bumpers help protect the block and deck.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible rigging:\u003c\/strong\u003e Thimble at the pivot base supports 1:1 or 2:1 up-down control.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Harken\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 3405\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e 1 Ton Twing Block\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave diameter:\u003c\/strong\u003e 1-1\/2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum line size:\u003c\/strong\u003e 0.43 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum working load:\u003c\/strong\u003e 2,205 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreaking load:\u003c\/strong\u003e 4,409 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Machined and anodized aluminum sideplates with an aluminum sheave\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended uses:\u003c\/strong\u003e Code zero twing or tweaker control, spinnaker sheet and guy control, and snatch-block use with a soft shackle\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the Harken 3405 1 Ton Twing Block for streamlined one-handed rigging and high-load control across demanding sailing applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e Harken 3405 1 Ton Twing Block with one-handed rigging, 2,205 lb working load, smooth bearing performance, and protective bumpers for sailing.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOwners Manual Url: https:\/\/productimageserver.com\/literature\/ownersManual\/103567OM.pdf\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Harken","offers":[{"title":"Default Title","offer_id":44937045868633,"sku":"103567","price":251.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/103567XL.jpg?v=1789836791","url":"https:\/\/www.marinepartsonly.com\/products\/harken-3405-1-ton-twing-block-2-205-lb-working-load","provider":"Marine Parts Only","version":"1.0","type":"link"}