Screw Hook Size: Screws Hooks overall length 12inch 30pcs Screw Hook Size: Self-Tapping Screws overall length 12 inch, eye outside diameter 1.7 inch, eye inside diameter 1.37inch, screw thread length 1.5 inch, thread diameter 5 mm. Screw Hooks Material: Made of metal, smooth nickel-plated surface, better bearing capacity,deep enough inner circles,easy to use Easy to Insert：The wall hooks screw tip can easily bite into plywood, wood or drywall, plasterboard,Tough and solid steel material ensures stability and strength. Pre-drill a small pilot hole will be suggested for a perfect installation. Widely Used: Perfect to attach cables, chains and ropes to the wall and wood suraces. Good for hanging patio lights, lanterns, keys, baskets, wind chimes, garden tools and other small items, Also can be Used to Hang Stuffs in Porch, Hanging Plant in Garden. Screw hooks