[Powerful Stainless Steel Pulley Block] Each V Type Single Wheel Pulley Block has 4 mounting holes with a hole diameter of 7mm, compatible with 3-12 mm width flat belts. It can be mounted on various surfaces including wood and metal. (Includes 4 self-tapping screws and 4 yellow expansion plugs.) [Superior Groove Wheel] The Single Wheel Lifting Rope Pulley Block is made of high-quality stainless steel, ensuring durability and easy cleaning. The reinforced steel plate increases load capacity, supporting up to 800 pounds. [Smooth Duplex Bearing Design] The duplex bearing reduces friction, allowing the pulley to rotate smoothly and quietly during operation. [Wide Application] This wall mount pulley block is suitable for home fitness equipment, wire rope traction, DIY gym systems, cable lifts, ladder lifts, gym machines, sliding gates, and other outdoor applications. [Easy Installation] The pulley is designed for simple installation. Mark the hole positions, drill 4 holes in the wall using a drill bit, insert the expansion plugs, and secure the pulley with the included screws.