Features: Wide range of usage: The snow tire studs can be widely applied for cars, trucks, bicycles, motorcycles and more, which can effectively increase the friction between the tire surface and the ground, providing you with a stable and relaxing driving experience. They are also suitable for snow boots, letting you to go out for climbing, hiking, camping on snowy days. Convenient to store and use: You can easily choose to install and disassemble the snow carbide spikes at your will according to the seasons. When you are not using them, they can be removed easily and stored in a small box without taking up much place. Specifications: Material: carbon steel, aluminum, hard alloy Color: black Size: about 9 mm/ 0.35 inch in length and 4 mm/ 0.16 inch in diameter Quantity: 401 pieces Package includes: 400 x Carbide screw tire studs 1 x Installation tool Note: Small parts included, please keep away from children in case of chocking risk. Please check the dimension details carefully before placing an order. Manual measurement, please allow slight errors on size. The color may exist slight difference due to different screen display