1) 4mm canulate design, the maximal dismeter of drill bit can be 4.5mm
2) High quality material, resisting high pressure
3) Power supply of the electric drill and saw is a rechargeable battery and the battery and charger is separated when used, which is safety, reliable and easy-to-take.
4) It can increase operation efficiency and precision and reduce operation time and patients pains.
5) Professional bottom cover design.