Plastic Probe: Plastic Probe, Easy To Measure, Able To Measure Tire Tread 0-20Mm Plastic Ruler: High Quality Abs Material, Easy To Carry, Wear-Resistant And Resistant To Falling Clear Scale: The Scale Font Is Clear, Digital Reading + Scale Reading, Secondary Verification Lider Design: Easy To Measure Tire Depth, Easy To Operate, Ergonomic Design Size: 45*43Mm, 4Pcs Tire Depth Gauge, Orange Product Feature Plastic Probe: Plastic Probe, Easy To Measure, Able To Measure Tire Tread 0-20Mm Plastic Ruler: High Quality Abs Material, Easy To Carry, Wear-Resistant And Resistant To Falling Clear Scale: The Scale Font Is Clear, Digital Reading + Scale Reading, Secondary Verification Slider Design: Easy To Measure Tire Depth, Easy To Operate, Ergonomic Design Size: 45*43Mm, 4Pcs Tire Depth Gauge, Orange Tire Depth Gauge Range: 0-20Mm Material: Abs Weight: 12G Difference: +/- 0.1Mm Replace Tire Recommendations 1. Tire Wear Limit Value 1.6Mm, It Is Recommended To Change 2. Summer Tire Driving Wear 3Mm, It Is Recommended To Change 3. Winter Tire Driving Wear 4Mm, It Is Recommended To Replace Package Includes 4 * Tire Depth Gauge (Orange)