Ronstan Series 45 Core Block - Halyard, Swivel Fork Head water inlet plate The patented extruded hole design

The patented extruded hole design

front zip closure with 25mm adjustable webbing strap and side release buckle

The universal joint in high grade

Suits pre-spliced lines Removable becket pins allow fitting of pre-spliced lines

Ronstan Series 45 Core Block - Halyard, Swivel Fork Head water inlet plate The patented extruded hole designCore Blocks are a true all round solution. A tuned 2 stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle high dynamic or static loads. Acetal sheave, alloy cheeks and stainless fixings complete the durable package. For reliability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for