Durable: All metal structure, steel wire constitutes the most durable retractable holder, which has passed more than 100,000 rod tests. The package contains 2 retractable holders with reel holders and straps. Maximum load weight: 120 grams or 8 grains. Non-rechargeable card: 67.31 cm steel wire rope, which is stronger than ordinary 60.96 cm nylon drawstring. This retractable scroll can unlock doors and leave . Strong back buckle: The clip is screwed on the back, so there is no need to worry about it falling off. It can be clipped to belts, pockets, wallet straps, backpacks or any place you like. The perfect name card for any industry, men and women. Very suitable for nurses, maintenance and office workers, airport and , security personnel, police, government, teachers, students, custodians, factory workers, employees, outdoor enthusiasts, etc. Comes with a key ring and a perfect retractable key chain. colour: black Material: metal size: 4cm diameter Package Contents: 2*ID Keychain Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.