3/8" Nitrocat Composite Impact WrenchMfr #: 1355 XL Provides 500 ft lb maximum torque and 700 ft lb of loosening torque The NitroCat 1355 XL is a no non sense, hard hitting 3 8" impact wrench that incorporates a twin hammer mechanism Provides all the torque you need and tremendous speed to get the job done Patented quiet tuned exhaust (86 dBA) Patented easy operation flip lever forward and reverse Durable KevlarTM reinforced "Body Armour" housing Great for brake calipers and transmission