and sturdy: the wheel tyre snow studs are made of carbon steel, aluminum and hard alloy, which are sturdy and , tough and , with strength and fine craftsmanship, not easy to , rust or corrode, so as to you for a long time.Size details: the snow tire spikes trims measure about 12 mm/ 0.47 inch in length and 4 mm/ 0.16 inch in diameter, and the tip diameter is . 2.3 mm/ 0.09 inch, the size is suitable for bicycle, , motorcycle and more; check the dimension details carefully placing an order.Practical function: the screw in tire studs can increase the friction between the tire surface and the ground, so as to the stability of the vehicle in the process of running, suitable for driving or on snowy , and the small size is also applicable for snow , allowing you to go climbing, hiking, camping without sliding and falling .Easy and quick to install: the hard alloy tire stud screws are easy to install with the included installation tool, just simply put the screw on the drill machine with the metal sleeve, and then drill the screw into the tire, convenient and time-saving.Type:Tire Stud ScrewsItem Size: 4x12 mm(per)Durable Vehicles Off-Road Wheel Tyres 12mm Tire Snow Chains Spikes StudsThe new style screw in tire studs can be installed and removed without It can also be disassembled according to the reason, When not in use, it could be removed lightly and stored for using again in following. appropriate size of new studs in the installation process in terms of the depth of tire threadEasy to install and remove - less than 1 hour with simple hand toolsEconomic - off-road capability to your"normal" ATV,UTV or Colour: silverMaterial: metalPackage Contents:100 * Tire Stud ScrewsOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed is +/- 1-3cm.