1 Ton Twing BlockThe 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. Features: Side opening side plate - Easy to rig and remove from sheet Spring loaded button release - Quick one-handed rigging Anti-capsize bar - Keeps sheave aligned on sheet ULC main bearing - Sheave turns smoothly under extreme loading Sideload balls - Carry loads especially when the block is not aligned in light air Thimble at pivot base - Use 1:1 or 2:1 up-down control Machined aluminum inner sideplates - High strength, low weight Soft polyurethane outer side plate bumpers - Protects block and deck Uses: Twing, tweaker control for code zero sheets Can be used as a snatch block when combined with a soft shackle Spinnaker sheet and guy control Specifications: Sheave ; (mm): 38.5 mm Sheave ; (in): 1-1/2 in Maximum line ; (mm): 11 mm Maximum line ; (in): .43 in Maximum working load (kg): 1000 kg Maximum working load (lb): 2205 lb Breaking load (kg): 2000 kg Breaking load (lb): 4409 lb Owner&';s Manual (pdf)