XIANQI Fit for100% brand new and high quality calipers gauge. 2 pcs silver tone metal inside outside calipers, great for measuring the external and internal size of an object. Method of useThe caliper is a tool for measuring the length, which is divided into a tableless caliper and a table caliper. The method of use is a steel ruler size method and a caliper measurement method. Inside caliperThe inner caliper is used to measure the inner diameter or groove width of the cylindrical hole. Outer caliperThe outer caliper is used to measure the outer diameter of the cylinder or the length of the object. High-quality materialsOur inside outside calipers are made of high quality stainless steel, solid , anti-rust and durable. Specification: Condition: 100% Brand New Product Name: Caliper Material: Stainless steel Caliper size: about 150mm (6 inch) Usage: measurement Package list: 2 * Calipers