Most are made from stainless steel (often specified as 304). Some products combine metal hooks or hardware with other materials for the hanger body, for example acacia or other wood accents.
Common mounting methods include over-the-door and over-the-cabinet hangers, adhesive wall hooks, S-hooks that hang on rods, and hardware-based picture-hanging kits (ceiling mounts or screw-in hooks).
Capacities vary widely by type: small adhesive or decorative hooks list around 0.5 lb per hook, many over-the-door hooks list roughly 4 lb per hook, D-rings in hanging kits can support up to about 44 lb, and steel cable kits sometimes show breaking strengths around 242 lb. Check each listing for exact specifications.
Many adhesive key holders, decorative adhesive hooks, and over-the-door/over-the-cabinet hooks advertise tool-free installation. Picture-hanging kits and some hardware mounts include screws, clamps, or ceiling mounts and require basic tools for installation.