After installation

1 x 6 Reduced Shank Drill Bit (1/2 Shank)

Wall Anchors work in all types of materials

1/4 x 3 1/2 Flat Split Drive Anchor Zinc Plated (100)

7/8-14 x 4 Grade 5 Hex Cap Screw Zinc Plated

7 x 2 1/4 Simpson Trim-Head Self-Drilling Siding Screw - Square Drive 410 SS - Carton (4000) 3/4-16 Hex Cap Screws 316 Stainless Steel After installation7 x 2 1 4 Simpson Trim Head Self Drilling Siding Screw Square Drive 410 SS Carton (4000) . Attach wood siding, wood panels and metal trim to steel studs #1 square drive trim head, . 230" head diameter, #3 drill point Threaded 2 3 of overall length Drilling thickness capacity: up to 0. 125" (111 mils or 11 ga.)