Cyclus Tools digital calipers - a very useful tool for measuring all kinds of parts from 0 to 155mm on the bike, e.g. bottom bracket width, axle lengths, bolt circle diameter, various clamping diameters etc. Can be used to measure inside and outside length and depth, with locking screw. Switchable display mm/inch, zero adjustment at each position, automatic switch-off. Delivery includes battery (LR44/AG13) and plastic storage box.