About Endodontic Finger Ruler
During root canal treatment, each file is measured and its rubber stopper set to the working length. A finger ruler is worn on your finger like a ring, so the scale is always to hand and you can measure a file without putting it down or reaching for a separate ruler.
What it is
- A small measuring plate mounted on a metal finger ring.
- A marked scale from 0 to 35 mm, covering common endodontic file lengths.
Using it
Place the file tip against the zero end of the scale, slide the stopper to the length you need, then check the reading. The ruler measures instruments; it does not determine a patient's working length, which is set by your own clinical method.
Ordering
- Order by quantity.
- If your measurements need a stated accuracy, ask and we confirm the tolerance of the supplied ruler in your quotation.
- Evaluation samples of 1–3 pieces per pattern are available.
Care
Check that the markings stay legible and the plate is firm on the ring. Follow the supplied processing instructions and your facility's validated protocol.
For other endodontic instruments, see our hand plugger set and rubber dam instruments.



