A very handy pocket dial caliper that's made of stainless steel material. It is excellent for measuring the inside & outside dimensions of many things including rods, plates & tubing, etc. Readings in 1/64" & .01 Grads with a 4" measuring capacity. Designed to fit into your work belt, pocket, apron or vest. It has a knurled thumb roller enabling one to use it with one hand, & a positive lock too. The jaws of this dial caliper are precision ground. Includes a soft case for storage. An excellent tool for machinists, woodworkers, & mechanics. A very popular caliper with our customers.