Easy to use, can be applied using a Phillips screwdriver, No.1 bit for 4 gauge, No.2 bit for 5-12 gauge or Phillips bit in a power tool. Pan head with flat underside designed to provide maximum holding power on flat surfaces. Taps it own thread as the screw is driven in – self tapping. APPLICATION: For fixing fittings, brackets, light duty angle, connectors, sheet metal to sheet metal END USER: Builders, Shed Builders, Sheet Metal Workers and DIYers FEATURES: Cold forged and roll formed, pan head with flat underside, full self tapping thread with AB point made from hardened wire and electroplate bright zinc finish