- No.2 self-drilling tip.

- Manufactured to mechanical specification SAE J78-1979 to achieve a surface hardness up to 650 HV to prevent torque shearing under load and a core hardness of up to 400 HV for improved ductility.

- Made from C10-18 steel.

- Plated in zinc 3-5 microns.

Four Sizes to Choose From:

- 4.2mm x 13.5mm.

- 4.2mm x 16mm.

- 4.2mm x 19mm.