Reducing bushing adapters are suitable for different sizes of grinding wheels and sanding wheels. Multi-size adapters make the use of bench grinders versatile and cost-saving. Material: Bearing steel is rust-resistant. The three sleeves with different inner diameters have a simple structure and are easy to use, often used for high-precision machining. They are suitable for a 1-inch wide bench-type grinding wheel. The shaft sleeve can be installed to balance the grinding wheel, reduce vibration during rotation, and offers low friction and noiseless operation. Made of bearing steel material with high-frequency quenching treatment, it is wear-resistant and requires no frequent maintenance. It will not deform, age, or crack as easily as traditional plastic bushings. Easy and simple to use kit. Dimensions: #1, ID 1/2 inch x OD 5/8 inch x L 1 inch; #2, ID 5/8 inch x OD 3/4 inch x L 1 inch; #3, ID 3/4 inch x OD 1 inch x L 1 inch Color: Gray steel Material: Bearing steel Package Contents: 1 Set x Reducing Bushing Adapters Only the above package content, other products are not included. Note: Lighting and different displays may cause slight color differences between the item in the picture and the actual product. Measurement allows an error of +/- 1-3mm.