A bit that cams out mid-drive strips the recess and rounds the fastener head — now you're replacing screws and re-driving, which costs more time than the bit was worth. For production fastening with recessed-head fasteners, the right insert bit keeps the drive consistent from first screw to last on the strip. Powers Square Recess #2 configuration provides more engagement surface than Phillips — less cam-out tendency under sustained driving torque, which matters when you're running 500 screws on a deck project. Heat-treated steel holds edge longer in hardwoods and pressure-treated lumber. 1-15/16-inch overall length puts the sweet spot of the bit in the nosepiece without bottoming out in most cordless drivers. Standard in the bit inventory of framing crews and deck builders acro Stocked at Crofton Lumber and Akron Lumber.