GOOD TOOLS FOR GOOD WORKS, IMSCREWS FIX YOUR HOME. IMSCREWS MODIFIED TRUSS HEAD SELF-DRILLING SCREWS 50PCS #7*1/2'' (13mm) ZINC PLATED ?? High Quality Coarse Thread Truss Head Self Drilling Screws ?? Drive Type: #2 Phillips Drive; Head Style: Truss Head ?? Material: Carbon Steel, Zinc Plated ?? Size: #7, Phillips drive ?? Length: 1/2'' (13mm) ?? Package Quantity: 50-Piece FEATURES: ?? These screws have a sharp point to drill in wood and metal sheet, and coarse thread design to help grab into metal studs. ?? The Phillips drive has #2 x-shaped slot that accepts the Phillips driver and is designed to allow the driver to slip out of the head to help prevent over-tightening and damage to the thread or fastener. ?? These screws are organized by Size / Type in a Transparent Storage bag for Quick Access and Protection in an IMSCREWS plastic bag. ?? Steel with zinc-plated has high strength and hardness ratings and resists corrosion in mild environments ?? Self-tapping screws provide secure fastening with strong holding power without the need to pre-drill. ?? It is wood drill tail screw, mainly used in steel structure caigang watt fixed can also be used for fixing the simple.