There are multiple sizes of garage Hooks to fit all of your needs ranging from items as big as bicycles to the smaller ones like extension cords.This set of garage hooks comes with all the hardware necessary for use and is heavy enough to handle anything you need.The hanging hooks allow staggering all of your equipment and tools to make the best use & nicely organizing your garage space.For wooden/brick/concrete walls(1) Mark two small holes.(2) Drill a hole and hammer in the white plastic anchor.(3) Twist the steel screw nailSPECIFICATIONSizesLarge square type hook: .1"(L) x 6.1"(H) x 2.4"(W)Medium square type hook:4.7"(L) x 4.7"(H) x 2.4"(W)Small square type hook: 2.4"(L) x 3.94"(H) x 2.4"(W)Medium J type hook: 4.33"(L) x 5.12"(H) x 1.38"(W)Small J type hook: 2.56"(L) x 3.94"(H) x 1.38"(W)Diameter:Large holSize:0.33"Smaller hol Size: 0.23"Length:Steel screw nail: 1.18"Black wide thread screw plug:1.3"White plastic anchor: 1.18"The distance between screw holes: 1.2"-2.0"Note: Please choose according to the size and weight of the items to hang.PACKAGE INCLUDED2 x Large square type hooks1 x Medium square type hook5 x Small square type hooks1 x Medium J type hook3 x Small J type hooks48 x Pcs steel screw nails24 x Pcs black wide thread screw plugs24 x Pcs white plastic anchors1 x User manual Garage Hooks Heavy Duty, 12 Pack Steel Garage Storage Hooks, Tool Hangers for Garage Wall Utility Wall Mount Garage Hooks and Hangers with Anti-Slip Coating for Garden , Ladders, Bulky Items .