Master Mechanic, 8", Crimped Coarse Wire Wheel Brush, Use On 8" Bench & Pedestal Grinders For Removing Paint, Rust, Dirt & Other Surface Contaminants On Metal Parts, Clean Threads, Garden Tools & Other Various Small Parts That Can Be Transported To The Tool, 5/8" Arbor, 4,500 Max RPM, 012 Gauge Wire, Clamshell.