the Alligator anchors expand to allow for better weight distribution

7 x 2 1/4 Simpson Trim-Head Wood Decking Screws - Square Drive 305 SS Tan 02 - Deck Pack (350)

They are actually stronger than most metal and chemical anchors

2-4 1/2 x 14 Socket Cap Screw Alloy

1/16 Heavy Duty Drill Bit - Stubby Length

7 x 2 1/4 Simpson Trim-Head Self-Drilling Siding Screw - Square Drive 410 SS - Box (100) 9/16-18 Socket Cap Screws Alloy the Alligator anchors expand to7 x 2 1 4 Simpson Trim Head Self Drilling Siding Screw Square Drive 410 SS Box (100) . 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.)