Pro Twist 8 X 1In Zinc 1/4 Slotted HWH S/P PT

Pro-Twist slotted hex washer head with self-piercing needle point is manufactured for the ultimate performance. Self-piercing needle point for sheet metal applications twin lead thread assures fast action and reduced driving torque and strip-out. Recommended for HVAC, electrical, plumbing, framing and sheet metal.