1pc Chuck Drill Converter 235 To 3/3175mm Electric Drill Adapter For Collet Reducing Diameter For Engraving Machines Handle Electronic Grinding Machine Clamping Engraving Chuck Reducer Collet Adapter Drill Converter 2.35 to 3/3.175 mm Shank Specification: Name : Electric Drill & Accessory Conversion head ( for engraving machines) Type: 2.35 to 3mm ,2.35 to 3.1 75mm Material : Stainless steel Uses: used for collet reducing diameter of various specifications Quantity:1PC Package Included: 1*Conversion head Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.