SS-BRW-21V P#6516 Pcs/CTN 5 Battery Model# SUPERSTEEL.IN005 Charger Model# SUPERSTEEL.IN105 Rated Voltage : 21V. D.C Square Drive Size : 9.5mm/3/8″ Torque : 100N.m No Load Speed : 0-320RPM Impact Frequency : 0-320RPM