SS-BIW-1500NM P#6483 Pcs/CTN 5 Battery Model# SUPERSTEEL.IN008 Charger Model# SUPERSTEEL.IN107 Rated Voltage : 21V. D.C Square Drive Size : 19mm/3/4″ Torque : 1500N.m No Load Speed : 0-2000RPM Impact Frequency : 0-2000RPM