40mm Dynamic Single Swivel Hook Block with Becket and Fiddle.

Made from high-strength, lightweight glass-loaded nylon and featuring Allen’s dynamic bearing technology for a high-performance block suitable for keelboats and dinghies.

40mm dynamic blocks are perfect for use on main, jib and spinnaker sheets on dinghies and keelboat control lines.

Bearings Dynamic blocks feature our patented bearing system which uses twin rows of stainless-steel ball bearings running on a stainless-steel rail. The ball bearings are caged for

further friction reduction. These features provide a superior load-carrying ability and longevity when compared to other bearing systems.

Swivel Hook Head Featuring a 360-degree swivelling hook for super easy attachment. Ideal for lightweight control systems where removal needs to be quick.

Becket This block has a specific becket (tying) moulding. The becket allows you to make a purchase system. Ideal for cunningham, outhaul and vang controls.

Fiddle The fiddle sheave is a 20mm dynamic bearing sheave. This ensures that any purchase systems run as smoothly as possible.