1 4" x 3 1 4" Strong Tie Flat Head Titen Turbo Screw Anchor, White Zinc, Pkg 75 Strong Tie SDPW Deflector Screws The PKP is a 2 The PKP is a 2 1 2" pin with a narrow 3 16" head which secures the form board in place but also allows the pin to be pulled out when removing the form boards If you have a nominal post measuring 5 1 2" x 5 1 2" you will need an APB66 Ornamental Post base The Simpson Strong Tie Titen Turbo screw anchor is a heavy duty fastener that features an innovative torque reduction channel to trap drilling dust where it can't obstruct thread action Includes (1) T30 drive bit and (1) standard ANSI drill bit