Hardened and brassed 0.3mm steel wire bristles. For deburring, derusting and descaling, as well as paint removal, finishing and surface preparation. Can be stacked onto tapered spindles to achieve required thickness. Supplied with 12.70mm (1/2"), 15.88mm (5/8"), 19.05mm (3/4"), 22.23mm (7/8") and 25.40mm (1") bore adaptors. For use with all 150mm bench grinders.