A chain is a series of connected links, usually made of metal. Chains are usually made in one of two styles, according to their intended use:
Roller chain Bicycle lock Jewellery Pull switch Flat chain O-ring chain Jack chain Door chain Lewis (lifting appliance) Lead shank Chain weapon Chain-link fencing Curb chain Gurre-Lieder Omega chain Chain-shot Ball and chain Chain pump Snow chains Schönberg Livery collar Fetters Hoist (device) From the House of the Dead Bicycle chain Keychain Hudson River Chain Chain gun Sprocket Chain drive Significant other Nunchaku Leoš Janáček Naval warfare Chainsaw Torus Dimension Internal combustion engine Cannon Metal