# Ratio — Power tool battery platform and accessory interface compatibility

For Ratio, brand is Heller; notes is Threaded shank, 14 mm outer diameter, with special double-start round threads, recorded from its source on 2026-08-11.

- **Item:** Ratio _(verified: appears in the quote below)_
- **Brand:** Heller _(our reading, not quoted from the source)_
- **Notes:** Threaded shank, 14 mm outer diameter, with special double-start round threads _(verified: appears in the quote below)_

## What the source says

> Ratio Threaded shank, 14 mm outer diameter, with special double-start round threads

## Source

- https://www.hellertools.com/en/service/shanks

Last verified: 2026-08-11. Review by: 2027-08-11.
Part of [Power tool battery platform and accessory interface compatibility](https://referencesource.org/power-tool-battery-compatibility/).