These are made for drill, not for grinder
Used to remove rust,weld slag,coatings,rubber,paints,powders.silicone and clean or maintenance equipment
Normally used to clean metal surface or stone surface and pipeline surface
Material: wires are made of stainless steel,other parts are made of zinc alloy and steel
Size: whole diameter is 1"(25mm),stainless steel wire diameter is 0.012"(0.3mm)
Quantity: 5 packs
Shank diameter is 1/4"
1/4" shank diameter suit for most drills and die grinders
Max operation speed(RPM) is 4500 RPM
Stainless steel knot wire brush could last longer time than normal wire knot brush
We also supply other size like 3/4",3",4" wire knot brush or wheels .Pls search from our brand "DGOL" on amazon if you need

Package include:
5 pcs 1"(25mm) stainless steel knot wire brush