High grade 304 Stainless Steel Robe Hooks Towel HooksHook edge sanded, smooth not hurt, towels, hats, clothing, etc.It is as clothes hook, hat hooks, kitchen hooks, self-adhesive hooks, cargo hook, hook frames, curtain hooks, etc.Easy to install, just peel off the protective layer in the back and stick it on the desired position (must be smooth surface ,like ceramic tile, metal surface ,glasses, etc.). Recommended to leave it on 24 hours before hanging any objects