This screw can be used on all kinds of steel plates, iron plates, and roofing purlins. When applied on knurls that help enlarge the hole on the plate first, the screw can smoothly drive in and its threads can get a tight fit around the plate while reducing the possibility of scratching the screw shank. The length of drill tail depends on the thickness of the plate.

Key Features:
* It complies with Australian Standard AS3566.2 Class 4, suitable for ISO 9223 Category 4 environments.
* The drill tail has good positioning and cutting functions on the tapping materials, which improves the working efficiency.
* It can be paired up with EPDM rubber washers to increase waterproof function, and the head can be coated to match the colors of building materials