Zuverlässige schwarze Sechskant-Scheibenkopf-Selbstbohrschrauben 4 7 x 17 mm 20er-Pack
It is a wood drill tail screw, which is mainly used for steel structure color steel tile fixing, and can also be used for the simplest construction of fixing sheets. Head style: Hex washer head. Self-drilling screws, no pre-drilling required.