Features: 4 sizes of gages are supplied in a fitted case. Smooth, sensitive adjustment for better feel, giving more accurate measurements. Used with an outside micrometer for measuring inside diameter of bores-. Extra long for gaging deep and shallow holes, slots and similar work pieces. Gaging surface is fully hardened to insure long tool life. Package Includes: 4x Small Hole Gauge Specifications: Material: carbon steel Size: 1/8"-1/5",1/5"-3/10",3/10"-2/5",2/5"-1/2" note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item..Items from Sheng Xinshun's shop