• One-piece low‑friction triple block with swivel head
• CNC-machined, hard black anodised & Teflon-coated aluminium frame
• Equipped with three 50 mm composite fibre sheaves on stainless hubs with Delrin bearings
• Heavy-duty HR stainless steel swivel shackle with triple locking positions (swivel, longitudinal, transverse)
• Robust construction designed for complex rigging and multiple line handling
• Lightweight design with no assembly pins or screws, ideal for demanding marine environments

The Antal OPF 50 mm Triple Swivel Block (Model 00505) is engineered for advanced sail handling requiring maximum flexibility and alignment. It features three 50 mm composite fibre sheaves running on stainless-steel hubs assisted by Delrin bearings, ensuring ultra-smooth rope movement and minimal friction without lubrication. The one-piece CNC-machined aluminium frame is hard black anodised and Teflon-coated, delivering exceptional strength, corrosion resistance, and elegant styling.

A heavy-duty HR stainless steel swivel shackle offers triple locking positions—swivel, longitudinal, and transverse—allowing the block to maintain optimal alignment regardless of load direction. This triple sheave block is ideal for complex rigging systems where multiple lines are managed simultaneously. Its no-pin, no-screw design keeps the unit lightweight yet durable, perfectly suited for demanding marine use.

Specifications
Sheave Diameter: 50 mm
Line Size (Max): 10 mm
Safe Working Load (SWL): 800 kg
Weight: 240 g
Frame Material: Hard black anodised & Teflon-coated aluminium
Sheave Material: Composite fibre resin on stainless hub with Delrin bearings
Swivel Shackle: HR stainless steel, triple locking positions
Becket: No
Part Number: 00505 / ANT00505

The Antal OPF 50 mm Triple Swivel Block offers a premium combination of flexibility, smooth operation, and rugged durability, making it a superior choice for sailors who require reliable, low-maintenance deck hardware for complex sail control systems.