What size bottom bracket do I need? What size seatpost do I have? What size bearings do I need for my headset? All valid questions for beginner bike mechanics and technical specialists alike – and all answered with the precision Digital Caliper. With accuracy to 0.01mm and a 15cm capacity, this all-metal caliper sets the benchmark for Imperial and Metric measurement. • Accurate measurement to 0.01mm • Total length capacity of 15cm • Easily swaps between Metric and Imperial • Accurately measures inside diameter (ID), outside diameter (OD) and depth • Stainless steel metal body • Metal display body with oversized LCD display • Metal set screw for freezing measurements • Metal precision dial-wheel for ensuring accurate measurement • Common size dimension chart located on back plate • Zero function for clearly and accurately identifying length differences • Auto shut-off saves battery life • Protective hard case included • (1) 1.55v LR44 battery included • 1-Year Warranty