Ideal for a variety of general uses including surface blending, cleaning and polishing. Suitable for use on CNC (Computer Numerical Control) equipment or with any 1/4" diameter electric or air tool cordless drill or 01990 pneumatic (air) drill. No. 72737: Diameter: 1", Shank Size: 1/4" Hex, Wire .008", Type: Coarse, Maximum Speed: 20, Maximum Speed: 20, Max. 00 rpm m, Pkg Qty: 1, Package Type: Clamshell No. 72738: Diameter: 1", Shank Size: 1/4" Hex, Wire Size: .012", Type: Fine, Maximum Speed: 20,000 rpm, Pkg Qty: 1, Package Type: Clamshell No. 60003: Diameter: 1-1/2", Shank Size: 1/4" Hex, Wire Size: .0202020". Type: Coarse Circ. Flared End, Maximum Speed: 15,000 rpm, Pkg Qty: 1, Package Type: Clamshell ---- 1. 2. Product **and other products made in Japan are not applicable. 3. Packaging and instructions are in English.