A polished stainless steel rigging pulley for working lines up to 16mm. The knurled-head locking screw is easy to use, and has a hole for a screwdriver or bar when you need extra leverage.

Flame cut-outs in the side plates bring the weight down to about 1.4kg without touching the strength: breaking strength is well over 100kN. Colour-coded wheels make it easy to pick the right block for the job. Made by ISC in North Wales.