Item Type: Digital Tire Tread Gauge Kit Material: ABS Digital Tread Gauge Parameter: Range: Approx. 0-25.4mm/0-1.0in Resolution: 0.01mm Accuracy: 0.02mm Working Temperature: 0-40 Built in Battery Model: 1PC LR44 Battery Capacity: 165mAh Package List 1 x Digital Tire Tread Gauge 1 x Tire Tread Gauge Pen 1 x Brake Pad Ruler 1Digital Display: The tire tread depth gauge is designed with an LCD screen, which is measured in millimeters and inches, providing fast and accurate readings. 2Practical Tools: Digital tire tread depth gauge can quickly check remaining tire tread to determine how often to replace, bringing more convenience to your repairing process. 3Compact and Portable: The tire tread depth tester is light weight and compact in size, fits easily in a pocket or tool bag, easy to carry around with taking up less space. 4Color Coded: Tire tread depth measurement tool is designed with green, yellow, red color, clearly shows if tire is good, worn or needs replacement, convenient to use. 5Wide Application: The 8 piece brake pad thickness gauge is suitable for disc and drum brake pads in any type of vehicle from passenger cars and trucks to heavy haulage.