Check the listing for details. Spring Inside Caliper 3.9Inch Stainless Steel Adjust Spring Caliper Straight-Leg. Condition: New. Listed at 11.94 USD. FeaturesInside calipers are frequently used to measure hole diameters and distances between surfaces.Firm joint calipers use friction at the joint, make sure the legs don't move while using it.Made of stainless steel hardened and finely ground tips. Strong, high hardness, wear resistance, durable and long service life.General tool for measuring the internal size of round stock or irregular shaped objects, such as sculpture, pottery, pipe, and so on.SpecificationMaterial: Stainless SteelOverall Size: 100x67mm / 3.9x2.6-inchColor: Silver TonePackage Content :1 x Inside Caliper.