[Strong Stainless Steel Pulley Block] Each V-shape single wheel pulley block has 4 mounting holes, the diameter of each hole is 7mm, suitable for flat belts with a width of 3-12mm. It can be mounted on various walls, wood and metal. (Comes with 4 self-tapping screws and 4 yellow expansion tubes.) [Advanced Grooved Wheels] The single wheel lifting rope pulley block is made of high-quality stainless steel, durable and easy to clean. The thickened steel plate enhances the load-bearing capacity of the sheave, which can carry up to 800 lbs. 【Super Quiet Dual Bearing Design】Silent dual bearings can greatly reduce the friction of the cable pulley, making the cable pulley rotate smoothly and smoothly. It is barely audible while working. [WIDE APPLICATION] The wall-mounted pulley block is widely used in home fitness, wire rope traction, DIY accessories for home gym pulley systems, inverted tracks, lifting pulleys, ladder lifts, fitness equipment, rolling doors, sliding doors and other outdoor projects. [Easy to Install] The pulley design is convenient for installation. Just mark the hole positions, drill 4 holes on the wall with a drill, then insert the yellow expansion tube into the holes, and finally fix the pulley with self-tapping screws.