Pocket Durometers are unbreakable, lightweight, and easy to carry around the plant for on-site testing. The sliding vernier scale is easy to read and has no cams, gears, or levers to wear out. The scale is divided into 5 point increments from 0 to 100. Scale holds maximum reading making it ideal for testing hard-to-reach areas. Measure 1/2"W x 4-1/2"H.