They are actually stronger than most metal and chemical anchors

the Alligator anchors expand to allow for better weight distribution

9/16-12 x 2 3/4 Socket Cap Screw Alloy

1 3/8-6 x 16 Socket Cap Screw Alloy

5/8-11 x 9 Grade 8 Hex Cap Screw Yellow Zinc Plated

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 They are actually stronger than7 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.)