These premium German made pen drill bits have been designed for drilling pen blanks. As such, they are longer than usual with an overall length of 5.90". Made from High Speed Steel for maximum wear resistance and diamond precision ground for optimal sharpness. A patented tip with four cutters offers superior drill performance when boring deep holes and prevents tear out at bit entry and exit. The bits also feature a parabolic flute design which offers optimal flute size and stability thereby preventing jamming and chip burn. These pen drill bits will greatly outperform regular brad point and twist drill bits for purposes of drilling pen blanks. Made in Germany. Click on any picture below for information on the pen drill bit that interests you.