The Killer Tools Spot Weld Pro M-Fit, No. ART19M, is designed to transform the Milwaukee M12 Bandfile (13" or 18") into a spot weld prep tool. A patented tri-pulley cleaning arm removes material from inner/outer flanges for precise welds. This tool features cordless mobility and requires no air lines. The secure M-Fit attachment and adjustable arm ensures accuracy. Includes three 1/2" by 18" medium-grit belts, tri-pulley arm, M-Fit pulley, and hex keys.