3inch (75 mm) Wheel*3pc, 2-1/2inch (63mm) Wheel*3pc, 2inch (50mm) Wheel*3pc, 1.57inch (40mm) Wheel*6pc, 2inch (50mm) Cup*3pc and 1.57inch (40mm) Pen*1pc. They're -made and the range of sizes comes in .steel brush for drill uses 0.012 Inch carbon steel crimped wire and fixing hold fast and do not bend easily which are made of a better of steel. Either way it has made durable as can be.Wire brush drill attachments can be used for quick surface adhering treatment spray coating and electroplating. The drill wire brush set also does in removal, such as removing rust, paint, burrs, and corrosion from wide flat surfaces, small areas, corners, wheel hub and screw.wire brush attachment for drill is rigidly secured by a plate- or cup- thickened metal holder to a better safety and stability. The sturdy 1/4inch hex does not wear out or break easily and fits types of drill and mold grinding machines.Colour:silverMaterial:Alloy Steel + MetalPackage Contents:1 set x arbor accessoriesOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.