Series 5 54mm Crusier Blocks - Fiddle - Reverse Shackle Reverse Shackle Removable shackle that can be set in-line or at 90 to the sheave. This range of high load cruiser blocks are of rugged construction, featuring high quality injection moulded side plates with all loadcarrying components from 316 grade stainless steel. Side plates are through-bolted and riveted for added strength and security. This good looking and versatile range is designed for use on larger cruising and racing yachts. All are designed for ease of use with our ball bearing mainsheet traveller systems. A comprehensive range of cam cleat, fiddle, and fiddle and cam cleat versions are available Plain bearing blocks Barton plain bearing blocks have a precision moulded Acetal sheave running on a large diameter brass bearing, ensuring free running under the highest of loads. Length:185mm (7.28") Sheave Size: Single: 54mm x 17mm (2-?" x ?") Fiddle: 38/64mm x 17mm (1- / 2-" x ?") SWL: 750kg (1,650lbs) Max Rope Diameter: 12mm (7/16") Break Load: 1,500kg (3,300lbs)