EK OEM Replacement Carbon Motor Brushes Fit Dremel, Craftsman & Other Rotary Tools Keep your power rotary tool working like new by replacing worn, cracked or broken brushes Manufacturers recommend replacement after 60 hrs; bad brushes cause not running, stalling, low power Sintered graphite carbon composite brush blocks, solid copper shunt wires for superior conductivity Block size 5.4mm x 4.8mm x 9mm length, shunt wires 3/4" length, brass plate 7.5mm diameter Sold in pairs to fit many Dremel, Craftsman,other brand rotary tools 100-180 watts 110-120VAC