Review on 🔩 GRK 772691102256 16 Inch 4 Inch Screw: Ultimate Fastening Solution for Heavy-Duty Applications by Adam Gechem

Good faster for many applications. I used them to attach rain guard strips over the rigid foam. They are better than black head screws because of the coating, self-tapping tip and serrations on the underside of the pan head. The prongs allow you to sink the crown by simply tightening the clasp to the desired depth. Otherwise (e.g. Headlok) the countersink must be drilled with a Forstner bit.