Root ZX II is lightweight and features an expanded, easy to read display screen. The action of the meter in the display corresponds exactly to the tactile sensation of using the file. The base of the unit has also been modified for greater stability during procedures. Larger, easy to read screen Shock-resistant design. Unmatched clinical accuracy. Ability to work in wet canals. Modified design delivers improved stability. Self-calibrating; no buttons to push. Upgrade Option to Low Speed handpiece.