Features: High definitiondigital display screen reads clearly, accurately and quickly, and the digital display screen accurate to 0.01mm can be seenat a glance, and the value is accurately taken; The closed finetunings auxiliary wheel is designed to measure smoothly and improve the measurement accuracy; In the process of testing, any position iscleared, which is convenient for the measurement of relative value and absolutevalue; Tighten the nut locking data, and the topnuts can be tightened to lock the measured data, which is convenient and practical; IP54 double protections waterproof and dustproof design, not afraid of harsh environment, regardless of dust falling, sun and rain, will not affect the measurement accuracy; Zinc alloy shells cover corrosion-resistant and rust-resistant stainless steel thickened ruler body is polishedsmoothly; Metric/English twoway switches between metric andEnglish measurement with onekeys and automatically convert the measurement length;Low energy consumption, long battery life, automatic start-up for measurement, intelligent power saving, and no automatic shutdowns for a long time; Specifications: Material:Stainless Steel Size:Approx.15cm/5.9inch Size:Approx.20cm/7.87inch Size:Approx.30cm/11.81inch Accurate measurement/stainless steel/originchip/automatic shutdowns/long battery life/public-English switching Package Includes: 1x Digital Caliper note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. ②.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.