The 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. The outer caliper is used to measure the outer diameter of the cylinder or the length of the object. The inner caliper is used to measure the inner diameter or groove width of the cylindrical hole._x000D__x000D_Features:_x000D_1. Made of high quality stainless steel, solid ,anti-rust and durable._x000D_2. The caliper is a tool for measuring the length._x000D_3. The outer caliper is used to measure the outer diameter of the cylinder or the length of the object._x000D_4. The inner caliper is used to measure the inner diameter or groove width of the cylindrical hole._x000D_5. 100% brand new and high quality._x000D__x000D_Specification:_x000D_Condition: 100% Brand New_x000D_Product Name: Caliper_x000D_Material: Stainless steel_x000D_Caliper size: about 150mm (6 inch)_x000D_Usage: measurement_x000D__x000D_Package list:_x000D_2 * Calipers 1Made of high quality stainless steel, solid ,anti-rust and durable. 2The caliper is a tool for measuring the length. 3The outer caliper is used to measure the outer diameter of the cylinder or the length of the object. 4The inner caliper is used to measure the inner diameter or groove width of the cylindrical hole. 5100% brand new and high quality.