The milwaukee m18 bpp2a 402c heavy duty twin pack contains the following 1 x 18 volt hd18 pd heavy duty percussion drill has a heavy duty 13 mm full metal chuck that delivers optimum bit retention the hammer mechanism delivers 28000 bpm for highly effective masonry drilling and the 24 stage torque adjustment that delivers optimum control for the user with its milwaukee 4 pole frameless motor it delivers 85 nm of torque ideal for powering through the toughest of applications no load speed 0 4500