The Park Tool DC-3 Digital Caliper is a precision measurement tool for bicycle workshop use, designed for technicians who need accurate readings across a wide range of component dimensions. It measures external, internal, depth, and stepped dimensions - covering common shop tasks such as identifying seat post diameters, head tube dimensions, bearing sizes, and spoke gauges. The DC-3 reads in both metric and imperial units, with a range of 150mm/6 inches and a resolution of 0.01mm/0.0005 inches, displayed on a large LCD screen for clear, at-a-glance readability. Accuracy is rated at +/-0.02mm/0.001 inches with repeatability of +/-0.01mm/0.0005 inches, placing it firmly in the precision tier expected for professional service work. 150mm/6 inch measurement range handles seat posts, head tubes, bearings, spoke diameters, and moreMeasures external, internal, depth, and stepped dimensions to cover the full range of bicycle component measurement tasksResolution of 0.01mm/0.0005 inch with accuracy rated at +/-0.02mm/0.001 inchRepeatability of +/-0.01mm/0.0005 inch supports consistent readings across repeated measurementsSwitches between metric and imperial units on the large LCD screenBattery cover features a captured screw for compliance with child safety regulations in many countriesPowered by LR44 battery Park Tool DC-3 Digital Caliper Measuring Tool UPC: 763477002419 MPN: DC-3