- Used for time-saving preparation of the upper and middle part of non-curved canal or the straight part of curved canal effectively and creating the excellent access for reamers and files. - Enlarge the straight coronal portion of the canal with Gate drills and then step down with endodontic files using the biggest size firstly as the crown down technique. - Superior stainless steel with the improved cutting capacity. - Circle ring is coded on the shank. - Recommended speed: 800~1200r/min. **For further product information, please contact Chat Support**