Specifications: Colors:Dark Blue Material:Aluminum Alloy Size:about 4cmx4cm Case Size:8.3cmx11.5cmx2.3cm Screwdriver Length:about 4.5cm [Conversion: 1cm=0.3937 inch, 1inch=2.54 cm] Features: -4 Minute average spins. -Easy To Carry,Small,Simple and fun. -Great for anxiety,ADHD,autism,quitting bad habits,staying awake on long car drives,etc. The finger spinner is a device that has a ball bearing and a weighted outside area that allows you to spin the device with your finger to keep you from fidgeting. -Perfect fidget toy to keep your hands busy or to just play with. it feels nice in the hands and it is silent so you won't be bothering anybody. -Perfect size suitable for Adults and kids. Note: -Due to different producing batches, product details might be a little different. If you minding the difference, please buy it carefully. -Please allow 1-3CM differs due to manual measurement. -Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding.