Reliable and sturdy: The tire snow studs are made of carbon steel, aluminum, and hard alloy, providing durability and strength. Designed with fine craftsmanship, they are resistant to breaking, rusting, and corrosion, ensuring long-term performance. Size details: The snow tire studs measure approximately 4 x 9mm. This compact size is suitable for bicycles, boots, motorcycles, and more. Please verify the dimensions before ordering. Practical function: These screw-in tire studs enhance traction between the tire surface and the ground, improving vehicle stability during operation. Ideal for use on snowy surfaces, they are also suitable for snow boots, supporting activities such as climbing, hiking, and camping with reduced risk of slipping or falling. Easy and quick to install: The hard alloy tire stud screws are simple to install using the included installation tool. Attach the screw to a drill with the metal sleeve and insert into the tire for convenient, time-saving setup. Type: Tire Stud Screws Color: Silver Material: Metal Package Contents: 100 x Tire Stud Screws Note: Light reflection and differences in display screens may cause slight variations in color compared to the actual item. Measurement may vary by up to +/- 1-3cm.