Sturdy construction: The wheel tyre snow studs are made of carbon steel, aluminum, and hard alloy, offering durability, strength, and fine craftsmanship. Resistant to breakage, rust, and corrosion for long-term use. Size details: The snow tire spikes measure approximately 12 mm (0.47 inch) in length and 4 mm (0.16 inch) in diameter, with a tip diameter of 2.3 mm (0.09 inch). The compact size is suitable for bicycles, motorcycles, and other vehicles. Please verify dimensions before ordering. Practical function: Screw-in tire studs enhance traction between the tire surface and ground, improving vehicle stability during operation. Ideal for use on snowy or icy surfaces. Also suitable for snow hiking and camping, helping prevent slipping and falling. Easy and quick installation: Hard alloy tire stud screws can be installed easily using the included tool. Simply place the stud into the drill with the metal sleeve and drill it into the tire—convenient and time-efficient. Type: Tire Stud Screws Item Size: 4 x 12 mm (per piece) Durable off-road wheel tyre studs, 12 mm snow chain spikes The screw-in tire studs allow easy installation and removal. They can be disassembled as needed and stored for future use. Ensure proper stud depth relative to tire tread depth during installation. Easy to install and remove — takes less than one hour using basic hand tools. Enhances off-road capability for ATVs, UTVs, and similar vehicles. Color: Silver Material: Metal Package Contents: 100 × Tire Stud Screws Note: Color may vary slightly due to lighting and screen settings. Measurement tolerance: ±1–3 mm.