Strong-Drive metal screws are load tested and code listed, allowing you to get the maximum load values for installation. Comparison testing shows Strong-Drive XM Medium-Head Metal screws are stronger than many alternative fastener types in 33 ksi and 50 ksi steel decking. Strong-Drive® XM MEDIUM-HEAD METAL Screw (Collated) — #12 x 1-1/4 in. 5/16 Hex (1500-Qty) (Pack of 100).