This item is a mini digital tire tread. You can use it to determine degree of wear of your tires. It is made of Stainless steel and metal material for long-term use. There is no doubt that it's an excellent measure tool. Features - Color: Silver - Material: Metal+Stainless steel - Size: 7x4.8x0.4cm - Range: 0-30mm - Made of material, easy to carry, wear-resistant and shock-resistant. - The marking is easy to read. - Metal detect probe, easy for measurement and durable in use. - Easy and clear to read the numbers with the screen display. Warm Tip: Dear buyer, Due to lighting effect, monitor's brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand Thank you