This 75mm Switchable Ratchet Swivel Block from Harken allows sailors to hand-hold loaded lines, and offer balance between holding power and controlled easing. Designed with precise on/off control using accessible, easy-to-operate switches,

This boat block has been manufactured with lightweight nylon resin sideplates, which have been densely packed with long glass fibres for a compact shape and high strength-to-weight ratio. Throw in the added machined aluminum sheaves (which are hardcoat anodized for corrosion resistance), and you have the ideal companion to Harken’s popular Black Magic line.

Length: 137mm

Maximum Line: 12mm

Weight: 227g

Maximum working load: 341kg

Sheave: 75mm

Breaking load: 1361kg

Shackle pin: 6mm