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

Quantity 1000 - 5000 and available in larger quantities.