The Blue Spot Tools 3 PCE wire cup brush set is manufactured from steel wire. It is ideal for rapid rust removal from metal. This useful set contains a 25MM(1") end brush, 50MM(2") wheel brush and a 50mm(2") cup brush. Each wire cup has a 1/4" hex shank and a max speed of 4500 RPM. Ideal for preparing metal surfaces for welding and painting Hex shank: 1/4" / 6mm Wire thickness: 0.3mm Maximum RPM: 4500.
eBay