Specification:Material : Stainless SteelTotal Length: 200mm / 7.87"Color : Silver Tone Features:Firm joint calipers use friction at the joint to hold the legs not move.Made from stainless steel with hardened and finely polished points, 200mm long.There are one inside caliper and one outside caliper, inside caliper is available in the same size range as outside caliper.Outside calipers measure thicknesses and outside diameters of objects, inside calipers measure hole diameters and distances between surfaces.Great for you to measure the external and internal size of an object, such as sculpture, pottery and so on. Package Content :1 x Inside Caliper1 x Outside Caliper.