[Powerful Stainless Steel Pulley Block] Each V Type Single Wheel Pulley Block has 4 mounting holes with a 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 systems, wire rope traction, DIY gym pulley setups, lifting mechanisms, gate operations, and other outdoor applications. [Easy Installation] Designed for simple mounting. Mark the positions, drill 4 holes, insert the expansion plugs, and secure the pulley using the included screws.