Specification: Material: carbon steel, Color: black with silver, Dimensions: 6 mm, 8 mm, 6.35 mm (1/4''). Collet Chuck only, other accessories demo in the picture is not included. Suitable for automobile manufacturing, mold manufacturing, machinery manufacturing, etc. Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Please allow 1-5mm measuring deviation due to manual measurement. Package Includes: 1Pcs Collet Chuck Or 1Set Collet Chuck