Stainless steel; The towel hook constructed of high quality stainless steel make it waterproof and rustproof; Smooth surface, reduce your annoying cleaningThe hook size: 2.5inch(L) X 2.2inch(D) X2.2inch(H); The screw size: 1inch; The wall anchors size: 1inch. Small figure, able to hold objects in place, provides a tidy and commodious place to your family,Size of drill bit required:0.23inch(6mm).Easy to install; The robe hook comes with all the hardware screws accessories, very easy to install and the hook can bear 5kg, you can safely useEasy to clean; The Towel Hook no sharp edges, safely hang your towels,rope, umbrella, bag, washcloths,clothes, coats, hat, sweaters, swimwear, sack, kitchen supplies etcStainless steel; The towel hook constructed of high quality stainless steel make it waterproof and rustproof; Smooth surface, reduce your annoying cleaning