Durable: the elastic cord is made of plastic with well spring, steel ring and lanyard loop at the ends Size: total length without stretching 21.5 cm, coiled cord diameter 0.6 cm, coiled cord length without stretching 13.5 cm, maximum stretch length 100 cm Bright Colors: 7 colors of blue green red black yellow white purple available to meet your different key demands SUPER Elasticity: good gloss and fast rebound, including stainless steel wire rope, not easy to break, with load capacity extreme. Wide application: good for work card, wrench or other small tools in the workplace; Attach it to pants with a belt clip and you won't have to search for keys.