Size - 300mm 12 inch inside caliper and outside caliper with max open length (capacity) of 580mm/22.8 inch and 545mm/21.5 inch.
Material - Our firm joint calipers are forged from 410 stainless steel, with overall heat treatment, micro-magnetic, corrosion-resistant, high hardness, high torque, and good toughness.
Feature - Smooth surface and burr-free, accurate measurement, can be used for a long time and not easy to loosen.
Application - Outside calipers measure the external size, thicknesses and outside diameters of objects. Inside calipers measure the inner diameter or groove width of the cylindrical hole.
Usage - Firm joint caliper use friction joint to hold the legs not move, adjust a caliper to a scale dimension, one leg of the caliper should be held firmly against one end of the scale and the other leg adjusted to the desired dimension.