This fidget toy is helpful for stress relief and relaxation. The chain part is gunmetal, and the sprocket part is silver. I used it for about 10 minutes to check its functionality. You can spin it around in your hand, pinch and rotate it, or roll it on a desk. You can also disassemble it and enjoy just the chain. Hex wrench types are also available, but this one can be disassembled and assembled with a Phillips head screwdriver. Bicycle Motorcycle Motorbike