These coat hooks are made of good quality zinc die-cast material, the screws are made of iron. Easy to Install Installation Instruction Note: Please choose the right screws for your installation. Step 1: Fix the hooks to the location you want. Step 2: Place the screw in the corresponding hold. Step 3: You can use a screwdriver or drill to lock the screws into the wall or board. Read more Coat Hooks makes it easy to get organized and clean up unwanted clutter. Living room Entryway Cloakroom Bedroom Read more IBosins 12 Pack Black Coat Hooks Wall Mounted IBosins 6 Pack Black Heavy Duty Coat Hooks Wall Mounted IBosins 8 Pack Black Double Prong Coat Hooks Wall Mounted IBosins 8 Pack Silvery Double Prong Coat Hooks Wall Mounted IBosins 11 Pack Heavy Duty Double Prong Coat Hooks IBosins 6 Pack Black Heavy Duty Coat Hooks Wall Mounted Color Black Black Black Silvery Black Silvery Screw's Length 18mm 25mm+16mm 18mm 18mm 18mm 25mm+16mm