4-1/2", x-lock angle grinder, with x-lock wheel change, offers a reliable wheel change interface, up to 5x faster than conventional interfaces, pull lever to release wheels, ergonomic slim grip zone, powerful motor 10a & 11,000 rpm, epoxy coated field windings extend motor lifetime & preventing dust & debris, service minder brushess eliminates guesswork, stops grinder when preventative maintenance is required, includes auxiliary handle, wheel guard & side switch.