Self Drilling Screw Sheet Metal Hex Washer Head Case-Hardened Steel Zinc Finish Size #8 Length 3/4 In Driver Size 1/4 In Width of Hex Head 0.244 In Head Height 0.096 In Washer Dia 0.322 In Drill Point Size #2 Drill Point Length 0.211 In For Attaching Variety Of Materials To Metal Up To 12 Gauge Meets/Exceeds SAE J78 Package 224