Dewalt DWD450 1 2 in. VSR Stud and Joist Drill with Clutch New DCH253M2 Battery System : M18 35 624 Battery System : M18 Powerful 5150 rpm motor delivers power and speed to make the most demanding cuts with ease 0 AMPS CAPACITY IN STEEL (HOLE SAW) : 5 IN CAPACITY IN STEEL (TWIST BIT) : 1 2 IN CAPACITY IN WOOD (AUGER BIT) : 1 1 2 IN CAPACITY IN WOOD (HOLE SAW) : 6 IN CAPACITY IN WOOD (SELF FEED) : 4 5 8 IN CAPACITY IN WOOD (SPADE BIT) : 1 1 2 IN CHUCK SIZE : 1 2" CHUCK TYPE : KEYED CLUTCH : YES CLUTCH TYPE : MECHANICAL CLUTCH NO LOAD SPEED : 0 330 0 1300 RPM OF SPEED SETTINGS : 2 POWER TOOL TYPE : CORDED Mechanical clutch in low gear to prevent bit lock up and provides increased gear life