405-048011-13968 Features: -This plastic mandrel self taps into the wheel. -Note: 5/16 inch center hole is recommended for wheels 6 density or harder. -Shank Diam: 1/4 in. Product Type: -Non Woven Abrasives. Generic Specifications: -Use with unitized wheels 1 inch diameter x 1 inch wide x 3/16 inch center hole. -Use with Unitized Wheels 2, 2 1/2, or 3 inch diameter x 1/4, 1/2, 3/4 inch wide x 1/4 inch center hole. Dimensions: Overall Product Weight: -0.46 Pounds.