Ronstan RF45521 40mm Fiddle Block with Becket & Cam Cleat | Series 40The Ronstan RF45521 is a versatile and compact 40mm fiddle block featuring an integrated becket and cam cleat, engineered for efficient multi part control systems. Part of the durable Ronstan Series 40, this block is ideal for vangs, outhauls, cunninghams, and mainsheet controls on dinghies, keelboats, and small yachts. Built with a UV stable acetal sheave, ball bearing system, it offers smooth operation and long term performance. The cam cleat allows

and navigation aids essential in the often swift channel waters

(Bombardier/BRP/OMC)

and precision when it matters most

the 376 offers excellent strength

With a compact and lightweight construction

Includes Rod Holder II and StarPort mounting base

and marine-grade tinned wiring

making it ideal for boat hulls

UV-stabilised plastic with stainless steel hardware

a choice of ¼″ or 5⁄16″ clevis pin

With a breaking load of up to 998kg

Improves recovery speed and safety