Self Drilling Screw Finish Zinc Plated Material Steel Head Type Hex Washer Screw Size 1/4 in Fastener Length 3 in Drill Point Size 3 Drill Tip Length 25/64 in Head Height 0.19 in Washer Outside Diameter 0.52 in Drive Size 3/8 in Pack Size Small System of Measurement Inch Application For Attaching Variety of Materials to Metal up to 3 Gauge Head Color Silver Package Quantity 50