- M3-Safe Opener is applied with the UDG unique flat-side design. - It reduces the screw-in eject and make it safer than ever when enlarging the canal. - High cutting deficiency and stronger debris removal are maintained at the same time. Pack Contains: - 2 Pcs x 17/12 13 mm. - 2 Pcs x 17/14 16 mm . - 2 Pcs x 17/16 19 mm. **For further product information, please contact Chat Support**