Double-ended wood turner's calipers are designed to accurately and easily measure wall thickness and diameters in hollow forms and bowls. The double-ended design means that measurements taken at one end automatically transfer to the other end allowing accurate reading without removing the calipers from a project. Caliper measures 7 inches from pivot point to the tips. Maximum measuring depth 6-1/2 inches. Overall size is 14-1/2 inches. Made of blackened steel to prevent corrosion. Has solid brass pivot screw and wing nut.