60mm Cheek Block + Quicklock (Clockwise) - Plain Bearing

Spring loaded arm for precise and reliable locking operation- the spring holds the arm in open or closed positions. 
Quick Lock function is intended for temporary use only, and does not replace a normal clutch or a cleat. 
Acetal sheave.  
Torsionally rigid cheeks in glass fibre filled composite prevent jamming of the line. 
Radial loads are absorbed by a stainless strap inside the cheeks.