Check the listing for details. Darex V390 Drill Bit Sharpener w/ Drill Chuck. Condition: Used. Listed at 1250.00 USD. The Darex V390 Drill Bit Sharpener with Drill Chuck is a reliable tool designed for sharpening drill bits in a professional setting. Its built-in drill chuck allows for secure attachment and precise sharpening of various sized drill bits, making it a convenient and efficient solution for metalworking and manufacturing businesses. With this sharpener, companies can ensure their cutting tools are always in top condition, leading to improved accuracy and productivity in their work.