About This

• 【Create a powerful 4:1 mechanical advantage system】:Lift heavier with less effort. Unlike single pulleys, this 2-pack set of double-sheave blocks is designed to work together. By rigging them with rope, you can build a highly efficient block and tackle hoist that reduces the lifting weight by up to 75% (4:1 ratio)—ideal for effortlessly hoisting kayaks, bikes, or heavy storage boxes to your ceiling.
• 【Hybrid 316 stainless steel & reinforced nylon】:The best of both worlds. The load-bearing shackle and axles are forged from 316 Marine Grade Stainless Steel for excellent rust resistance, while the body is molded from high-strength Reinforced PA66 Nylon. This composite design makes the pulley highly corrosion-resistant and ideal for saltwater marine rigging or outdoor camping setups.
• 【Lightweight, silent & surface-friendly】:Strength without the bulk. The nylon body makes these M35 blocks significantly lighter than all-metal alternatives, reducing sag in your lines. Plus, the soft nylon housing won't scratch your boat deck, car roof, or paintwork if it swings against them, and the self-lubricating wheels operate silently without metal squeaking.
• 【Stable fixed eye for tangle-free rigging】:Essential for double pulley systems. The top U-shackle pivots 180 degrees but maintains a fixed orientation (non-swivel). This is a crucial feature when running four strands of rope in a hoist system, as it prevents the block from spinning and twisting the lines into a knot, ensuring a smooth, straight lift every time.
• 【High capacity compact 35mm design】:Small size, heavy lift. Despite its compact 35mm wheel size (Total Length: 95mm), the double-axle structure supports a Safe Working Load of 250kg (550 lbs) and a Breaking Load of 1500 lbs (680 kg). The U-grooves are optimized to securely grip paracord and braided ropes up to 8mm (5/16 inch), preventing slippage during operation.