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