Self Drilling Screw Finish Climaseal Material Steel Head Type Hex Washer Drive External Hex Screw Size 1/4 in Fastener Length 1 in Drill Point Size 3 Drill Tip Length 7/16 in Maximum Drilling Thickness 0.21 in Head Width 0.438 in Head Height 0.23 in Washer Outside Diameter 0.61 in Drive Size 7/16 in Pack Size Small System of Measurement Inch Maximum Head Width 0.438 in Minimum Head Width 0.438 in Head Color Silver Package Quantity 250