3Pcs Reducing Bushing Adapters Reduced Diameter Hole for 1 inch Bench Grinding Wheels Rust-prevention - AliExpress
3 Kind of 1 Inch Thick Reducing Bushing Adapters Id 1/2 Inch Od 5/8 Inch | Id 5/8 Inch Od 3/4 Inch | Id 3/4 Inch Od 1 Inch For Bench Grinding Wheel Sanding Wheel 3 Pcs - Amazon.com
Amazon.com: Reducing Bushing Adapters for Bench Grinding Wheels (1/2", 5/8", and 3/4" Arbors) (1/2"-1 1/4"x1" (4)) : Industrial & Scientific