50MM BLOCK - QUADRUPLE

A2057 – 50mm Quad Dynamic Block | High-Performance Sailing Block for Keelboats & Catamarans

The A2057 50mm Quad Dynamic Block is a premium ball bearing block engineered to minimize friction and allow ropes to run at maximum speed, even under heavy load.

Perfect for keelboats and catamarans, this block is ideal for a wide range of applications — from jib sheet and mainsheet systems to backstay tensioning systems and everything in between. The 50mm quad is the go-to choice for high-purchase systems requiring minimal friction.

Patented Bearing System – Dynamic Block Technology Dynamic Blocks feature an exclusive patented bearing system using twin rows of stainless-steel ball bearings running on a stainless-steel rail. This delivers superior load-carrying capacity and outstanding longevity compared to conventional bearing systems on the market.

Swivel Lock – Flexible Orientation Control The A2057 comes with a removable swivel lock moulding. When installed, the shackle can be securely locked in 90-degree orientations. When removed, the attachment shackle spins freely for maximum rigging flexibility.

Becket – Centralized Load & Easy Rope Termination A central becket positioned between the sheaves allows for easy rope termination while keeping the load perfectly centralised for optimal performance and balance.