Phillips head screws driven with a standard bit that slips, rounds out the recess, or chips halfway through the drive — that's what happens when the bit metallurgy doesn't match the torque demand of the application. You swap bits twice a day and the screw heads are shot by the time you're done. 1-15/16-inch #2 Phillips insert bit — case hardened to resist the cam-out effect that kills standard Phillips bits. The insert bit design grips the screw head recess more securely than a conventional driver bit, reducing slip and recess damage under high torque. 1/4-inch hex shank fits all standard insert bit holders and quick-change chucks. Standard in the bit cases of electricians, drywall hangers, and finish carpenters across northeast Nebraska and northwest Iowa — the insert bit that drywall cre Stocked at Crofton Lumber and Akron Lumber.