1、Function: The screw in tire studs can increase the friction between the tire surface and the ground, so as to improve the stability of the vehicle in the process of running. 2、Wide Application: Suitable for most tire use, this cleat has a wide range to improve the drivability of your vehicle and is also ideal for bicycle and motorcycle use. 3、Sizes: The snow tire spikes trims measure about 16.2mm/ 0.64in in length and 9mm/ 0.35in in diameter, and the tip diameter is approx. 6mm/0.10in. 4、Durable Material: Made of high strength tungsten steel and aluminum, it is strong and durable, has a long service life, ensuring stable driving and high reliability. 5、Other Function: The small size is also applicable for snow boots, allowing you to go climbing, hiking, camping without sliding and falling easily. 50 x Screw Tire Stud Item Type: Screw Tire StudsMaterial: Tungsten steel and aluminumThread Diameter x Total Length: Approx. 9x 16.2mm/ 0.35x 0.64inCone Height: Approx. 2.8mm/ 0.11inInner Depth: Approx. 13.5mm/ 0.53inMinimum Thread: Approx. 11mm/ 0.43inTip Size: Approx. 2.6mm/ 0.10inColor: Silver colorScope of Application: Used for all kinds of car tire anti skid shoes without holesApplicable Model: Auto or Truck Forklift motorcycle