# Ratio — Power tool battery and accessory compatibility

For Ratio, system is drill bit shank; platform owner is Heller; subject type is shank interface, recorded from its source on 2026-08-11.

- **System:** drill bit shank _(our reading, not quoted from the source)_
- **Platform owner:** Heller _(our reading, not quoted from the source)_
- **Subject:** Ratio _(verified: appears in the quote below)_
- **Subject type:** shank interface _(our reading, not quoted from the source)_

## 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 and accessory compatibility](https://referencesource.org/power-tool-battery-accessory-compatibility/).