[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 expansion plugs. [Superior Groove Wheel] The Single Wheel Lifting Rope Pulley Block is constructed from high-quality stainless steel for durability and easy cleaning. The reinforced steel plate increases load capacity, supporting up to 800 pounds. [Smooth Duplex Bearing Design] Equipped with duplex bearings that reduce friction, ensuring smooth and stable rotation with minimal noise during operation. [Wide Application] Suitable for a variety of uses such as home fitness equipment, wire rope traction, DIY attachments for home gyms, inverted tracks, lifting systems, ladder lifts, gym machines, rolling gates, sliding gates, and other outdoor applications. [Easy Installation] Designed for simple setup. Mark the positions, drill 4 holes in the wall, insert the expansion plugs, and secure the pulley using the provided self-tapping screws.