Dual New Improved Sealed Ball Bearings - Scaffolding Lifting Pulley High Lifting Height and Very Fast Lifting Speed ​​- Scaffolding hoists can also have many other uses in all industries as they are designed for outdoor use, they are portable, have high lifting height and very fast lifting speed. Steel Wheel: 12inch dia/30.4cm; Materail: Aluminum; Diameter of rope: For 5/8 inch to 1 inch; Weight: 8.3 lbs Safety - Heavy duty swivel hook with safety clip, lifting pulley with safety . Lifting Pulley only does not include arm and bracket. Widely Used - Scaffolding hoists are designed to be hung from building scaffoldings to lift building materials to tradesmen, saving time, and money., Manufacturer: Akfldms