Descriptions: Reducing Bushing Adapters Fit for Bench Grinding Wheel Sanding Wheels Steel Reducer Id 1/2 Inch Od 5/8 Inch | Id 5/8 Inch Od 3/4 Inch | Id 3/4 Inch Od 1 Inch Material: Aluminum is rust-prevention and durable. It will not deform, degrade, rust, or crack like plastic wheel adapters. Features: 1. Three reducing bushing adapters fit for 1 inch thick bench grinding wheels / sanding wheels with 1/2inch, 5/8inch, 3/4inch, 1inch Arbor hole diameter. 2. Multi-sizes adapters make using of bench grinder variable and saving cost. 3. High machining accuracy, low coefficient of friction, no noise, can reduce the imbalance and swing of the grinding wheel. Size : #1: ID 1/2''x OD 5/8'' x H1'' #2: ID 5/8''x OD 3/4'' x H1'' #3: ID 3/4''x OD 1'' x H1'' Package Included: 1 Set x Bushing Arbor Adapters