Features Large screen display, you can read it very clearly It can switch between millimeter and inch M2.5 probe head, you can change a longer probe head according to your needs Metal integrated structure, stable and durable with high accuracy Removable rear cover for using on different magnetic gauge bases, its hole diameter is about 6.5mm / 0.26inch Features: Large screen display, you can read it very clearly. It can switch between millimeter and inch. M2.5 probe head, you can change a longer probe head according to your needs. Metal integrated structure, stable and durable with high accuracy. Removable rear cover for using on different magnetic gauge bases, its hole diameter is about 6.5mm / 0.26inch. Specifications: Material: Metal + Plastic Resolution: 0.01mm/0.0005'' Measuring Range: 0~12.7mm/0.5" Battery: 1 x Button Cell Battery Voltage: 1.5V Weight: Approx. 264g Package Included: 1 x Digital Indicator 1 x Button Cell Note: Please allow some error due to manual measurement. Thanks for your understanding. Package List