【Ultra-Precision Engraving, Clear Reading】: high-precision lasers engraved scale, delicate and error-free, with OLED dual-mode display (digital/pointer), to ensure fast and accurate reading
【Intelligent Dual Display】: high-definition OLED screen, supports digital/pointer dual interface display, still clearly visible under strong light, to meet the needs of high-precision inner diameter measurement
【Smooth Ratchet Mechanism】: precision ratchet knob design, comfortable feel, reduce measurement force error, carbide measuring surfaces after fine grinding, wear-resistant and impact-resistant
【Heat Insulation Guard, Anti-Deviation】: ABS high-strength heat insulation guard, high temperature resistance and deformation resistance; built-in locking device, fixed measurement value, avoid movement error
【Portable Box】: precision instrument-grade aluminum alloy packaging box, shockproof and dustproof, suitable for use in professional environments such as workshops and laboratories