Dottie PC 4000 Model Self-piercing self-tapping K-lath screw measures 1-5/8-Inch x #8 Dia. This screw with wafer head, provides large bearing surface. It has #2 Phillips drive. The screw in zinc-plated finish, has steel construction for added strength and durability. It is suitable for framing, electrical, plumbing and sheet metal applications.