1. Ruler material: stainless steel 2. Stainless steel ruler body, compact, high temperature quenching, not easy to deform, more accurate measurement 3. Thumb support and roller design ensure smooth measurement and improve measurement accuracy. 4. The ruler body is hardened, not easily damaged, and accurate to 0.01 to reduce errors. 5. The full-screen display is clear, durable and fast to use. 6. Measurement types: outer diameter, inner diameter, depth, step 7. Battery type: One 3V LR44 oxidation battery 8. Battery life: 1 year of continuous use 9. Measuring speed: 15M/S; 60IN/S 10. Total product length: 236mm 11. Total product height: 77mm
