Harken 1 Ton Twing Block, 1-1/2 in. Sheave

The Harken 1 Ton Twing block is a high-load snatch block designed for efficient rigging and sheet control. It features a spring-loaded, side-opening mechanism that allows for quick, one-handed operation, even while wearing sailing gloves. The block is constructed with black anodized aluminum sideplates protected by robust polyurethane bumpers to safeguard your deck and the unit itself.

Key Features:

• Side-opening plate for easy rigging and removal from the sheet
• Spring-loaded button release for one-handed operation
• Anti-capsize bar to maintain sheave alignment
• ULC main bearing for smooth rotation under heavy loads
• Sideload balls to manage loads when not perfectly aligned in light air
• Thimble at pivot base allows for 1:1 or 2:1 up-down control
• Machined aluminum inner sideplates for high strength-to-weight ratio
• Suitable for use as a twing or tweaker control for code zero sheets, spinnaker sheet and guy control, or as a snatch block when paired with a soft shackle

Technical Specifications:

• Sheave Diameter: 1-1/2 in. (38.5 mm)
• Maximum Line Diameter: 0.43 in. (11 mm)
• Maximum Working Load: 2205 lb. (1000 kg)
• Breaking Load: 4409 lb. (2000 kg)
• Manufacturer Part Number: 3405