Loosens Rusted, Frozen Nuts, Bolts and Screws. Unique design delivers over 200 ft. lbs. of "Shock Torque." Can be reversed to tighten. Can also be used with impact sockets! 1/2" sq. drive with 1/2" drive bit holder; #1, #2, #3, #4 Phillips, and 3/8" straight slot bits. 30000 1/2" Impact Tool 30150 1/2" Bit Holder 29630 #1 Phillips Bit 30180 #2 Phillips Bit 29550 #3 Phillips Bit 30190 #4 Phillips Bit 30170 3/8" Straight Slot Bit 29660 Case *All bits are made overseas *1/4" where bits insert into holder *Instructions on handle