RONSTAN Urethane Universal Joint, RF3133 Blocks_Lashing and Loop Commonly 57mm fiddle blocks are

Commonly 57mm fiddle blocks are for jibsheets and vangs on small dinghies

Harken® recommends equipping every system with Carbo lead blocks for safe furling from the cockpit

Additional features include stainless-steel wire guides for smooth transitioning and sculpted sides to reduce weight

1 9/16" (40mm) sheave is made from UV-stabilized acetal and accepts a line size of 5/16" (8mm)

with free-running ball bearings that roll on flat races with minimal friction

RONSTAN Urethane Universal Joint, RF3133 Blocks_Lashing and Loop Commonly 57mm fiddle blocks areSmooth, uniform rotation in all directions and a quick, firm response to steering movements. The RF3133 universal joint with snap on cover is designed to allow quick fitting and removal of the tiller extension from the fixed base. A curved surface adapter, Mfg No. RF3136 is available for mounting on round tiller sections.