Accurate measurement: The mechanical structure is made of carbon steel, and the is chrome-plated to the accuracy and stability of long-term use. . Simple operation: directly insert the bore gauge into the hole diameter, slot diameter, and pipe inner diameter to measure, and you can get accurate values. The tapered feeler gauge is made of stainless steel. The scales on the small , big , and cone are used to measure thin-walled parts, plastic pipes, inner diameters, and inner holes. It has the advantages of simple structure, reasonable, convenient and fast measurement. Anti-shedding: It adopts rolling pattern, which is not easy to fall off, feels comfortable and increases friction. The number on the handle may not be there, hope to understand, Weight: 1.50575724946 Pounds, Manufacturer: Oiiwowi