Reliable and sturdy: the wheel tyre snow studs are made of carbon steel, aluminum and hard alloy, which are sturdy and reliable, tough and firm, with nice strength and fine craftsmansh, not easy to break, rust or corrode, so as to serve you for a time.Size details: the snow tire kes trims measure about 12 mm/ 0.47 inch in length and 4 mm/ 0.16 inch in diameter, and the t diameter is approx. 2.3 mm/ 0.09 inch, the compact size is very suitable for bicycle, boot, motorcycle and more; Please chethe dimension details carefully before placing an order.Practical 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 proce of running, very suitable for driving or riding on snowy days, and the small size is also applicable for snow boots, allowing you to go climbing, hiking, camping without sliding and falling easily.Easy and quito install: the hard alloy tire stud screws are very easy to install with the included installation tool, just simply put the screw on the hine with the metal sleeve, and then the screw into the tire, convenient and time-saving.Type:Tire Stud ScrewsItem Size: 4x12 mm(per)ble Vehicles Off-Road Wheel Tyres 12mm Tire Snow Chains kes StudsThe new style screw in tire studs can be easily installed and removed without profeional toolsIt can also be disaembled according to the reason, When not in , it could be removed lightly and stored for using again in th followingseason.Choose appropriate size of new studs in the installation proce in terms of the depth of tire threadEasy to install and remove - le than 1 hour with simple hand toolsEconomic - add off-road capability to your"normal" ATV,UTV or 4X4Colour: sierMaterial: metalPackage Contents:400 x Tire Stud ScrewsOnly the above package content, other products are not included.Note: Light reflection and different displays may ca the color of the item in the ture a little different from the real thing. The measurement allowed error is +/- 1-3cm.