Features: Name:Tire Studs Material:tungsten steel alloy Product size:4*9mm Description: 1. Widely used in all kinds of cars, suv, snowmobiles, motorcycles, bicycles, etc. 2. Must-have for winter riding, non-slip wear, safe and reliable. 3.According to the depth of the tire thread, choose the appropriate new stud size during the installation process. 4.Low ground pressure - minimal impact on the environment. 5.Durable - quality engineering, durable. Package included: 100 x Tire Studs/100 x Tire Studs+ toolx1 Notes: 1. 1 inch = 2.54 cm 2. Please measure it yourself to choose the right size. 3. Due to the difference between the different displays, the picture may not reflect the actual color of the item. Thank you!