use 5mm hex bit recomend 14 gauge smart bit for perfect hole and countersink.
Batten screws 5mm internal hex drive 14 gauge x100 mm long grade 304 stainless steel price is per single screw
Click here to go to Galvanized Batten Screws
Pilot drill / countersink bit for these products click here
Drills pilot hole and countersinks for 14 gauge batten screw plus 2 spare pilot drills.
DEMONSTRATION VIDEO CLICK HERE
CLICK IMAGE TO SEE DISCOUNTED PRICE THIS PART
10 Gauge x 50mm Stainless Steel Square Drive Decking Screw 304 Stainless
Use number 2 square driver bit
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