Without the need to pre-drill holes

1 1/8-7 x 12 Socket Cap Screw Alloy

Coarse threads approximately 2/3 up the shank draw the decking tightly to the substrate

7 x 2 1/4 Simpson Trim-Head Self-Drilling Siding Screw - Square Drive 410 SS - Carton (4000)

1/2-13 x 6 1/2 Hex Cap Screw SS 316 (A4)

13/16 x 21 ITM SDS Max X-Cutter Hammer Drill Bit 3/8 Hex Lag Screws 18-8 Stainless Steel Without the need to pre-drill13 16 x 21 ITM SDS Max X Cutter Hammer Drill Bit . Industrial quality Special tungsten carbide tip Copper Silver brazing of carbide head Double spiral Fastest dust removal Fastest drilling speeds Clean round holes Less vibration Suitable for masonry, stone and brick aggregates Made in Germany