Malco 8X1-1/2 Zip-in Self-Piercing Screws | 1/4" Slotted Hex Washer Head Sheet Metal Screws | Fast & Easy Piercing | Zinc Plated (250 Count)

Malco 8X1-1/2 Zip-in Self-Piercing Screws | 1/4" Slotted Hex Washer Head Sheet Metal Screws | Fast & Easy Piercing | Zinc Plated (250 Count)

• A unique thread design and quality controlled manufacture spell the Zip-in difference.
• Zip-in's sophisticated heat treat process allows the screw to taper to a fine, sharp point without sacrificing critical point strength.
• Zip-in screws are faster driving, with a greater capacity for fastening heavier gauges of sheet metal than any other self-drilling type.
• Ultra sharp tapered point will not mushroom, break or walk.
• Undercut-indented hex washer slotted head always seats flush.

A unique thread design and quality controlled manufacture spell the zip-in difference. Zip-in's sophisticated heat treat process allows the screw to taper to a fine, sharp point without sacrificing critical point strength. A single starting thread is formed down to the very tip of the point and is the source of zip-in's penetrating power. A second thread above the point engages after initial penetration and drills in the screw double fast. Zip-in screws are faster driving, with a greater capacity for fastening heavier gauges of sheet metal than any other self-piercing type.