The Mercer 187010 4-inch x 1/2-inch Crimped Wire Wheel is constructed for even balance. The Mercer 187010 is made of .014-inch carbon steel and has a 5/8-inch fixture to fit most 4-1/2-inch grinders. Features: * Bristles are secured with a plate * Made of carbon steel * 5/8-inch fixture What"s In The Box: * Mercer 187010 4-Inch x 1/2-Inch Crimped Wire Wheel