Helffer Single Pulley Block (35mm / 50mm), Lockable 360° Swivel & Heavy Duty Silent Nylon Wheel with T316 Stainless Steel Hardware for Gym Cable, Garage Hoist & Marine Rigging

The Helffer Difference: Silence, Strength, and Control.Standard pulleys force you to compromise: metal is strong but noisy; plastic is quiet but weak. The Helffer Single Pulley Block Series gives you the best of both worlds. By combining a Reinforced PA66 Nylon Body (for silence) with a T316 Stainless Steel Core (for strength), we created a pulley that is rust-proof, whisper-quiet, and incredibly tough.The Game Changer: Lockable Swivel Technology Need a rotating pulley to untangle ropes? Or a fixed pulley for a stable pull? With Helffer, you decide. Swivel Mode: Loosen the set screw for 360° rotation.Fixed Mode: Tighten the screw (Allen key required) to lock the head in place.Choose Your Size: M35 vs. M50Option 1: M35 - The Home Gym Specialist Compact and agile. Perfect for DIY fitness systems where silence is key. * Load Capacity: 250kg (550 lbs) * Wheel Diameter: 35mm * Fits Rope: Up to 8mm (5/16")Option 2: M50 - The Heavy Lifter Larger and stronger. Designed for heavy garage hoists, commercial gyms, and thick ropes. * Load Capacity: 400kg (880 lbs) * Wheel Diameter: 50mm * Fits Rope: Up to 12mm (1/2")Technical Specifications (Parent Data):Feature Specification Body Material Reinforced PA66 Nylon (Black) Hardware Material T316 Marine Grade Stainless Steel Bearing Type Silent Plain Bearing Unique Feature Lockable Swivel Head (360° or Fixed) Applications Gym Cable, Garage Hoist, Marine Rigging

• 【2-Pack 250kg Capacity Setup】: Get the ultimate matched pair. Don't let the compact size fool you; each 35mm block handles a Safe Working Load of 250kg (550 lbs), bridging the gap between basic pulleys and industrial hardware. Perfect for setting up dual-cable home gyms, double heavy bag hangings, or complex lifting systems.
• 【Lockable 360° Swivel Head】: Versatility meets precision. The T316 stainless steel swivel top features our signature locking mechanism. Loosen it for 360-degree free rotation to prevent rope tangling, or tighten the hex screw to lock the angle.
• 【Silent PA66 Nylon Sheave】: Smoother action, less friction. Unlike metal wheels that grind and screech, our high-density 35mm nylon wheels ensure a buttery-smooth, whisper-quiet glide. Ideal for fitness lat pulldown attachments and indoor DIY setups.
• 【100% Rust-Proof & Weather Resistant】: Built to outlast the elements. Combining an impact-resistant nylon body with a Marine-Grade T316 stainless steel core, these lightweight pulleys are completely corrosion-proof. Perfect for humid outdoor use, sun shade sails, and marine rigging.
• 【Universal Fit & Rope Protection】: Designed to extend the life of your gear. Compatible with cords, paracords, and wires up to 8mm (5/16"), the smooth nylon wheels eliminate burrs that fray ropes. An excellent upgrade for keeping lines tracking perfectly in fitness or outdoor traction systems.