Irwin Impact Performance Series Square #3 X 1-15/16 in. L Power Bit Steel 2 pc

These power bits are designed with precision tip geometry so they fit fasteners more precisely, which reduces stripping and cam-out. They're designed with a 1/4 in. quick-change shank, so they work with all types of impact and rotary drivers. Plus, they also have a unique power groove design for use with the exclusive Irwin magnetic collar attachment, which prevents fasteners from slipping and wobbling.