Features Steel/Zinc Plated, Self Tapping Thread, Drill Point Driver Bit Size: 3/8" Hex : 3 Finish: Steel/Zinc Plated Steel Gauge: 3 Range of Material Thickness: 0.110 - 0.220 in Size: 1/4-14 x 1 Thread Type: Self Tapping Thread Specifications Length: 1" Size: 1/4-14 x 1 Color: Steel/Zinc Plated