# Tri — Power tool battery and accessory compatibility

For Tri, system is drill bit shank; platform owner is Heller; subject type is shank interface; compatible with is a 3-jaw drill chuck, 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:** Tri _(verified: appears in the quote below)_
- **Subject type:** shank interface _(our reading, not quoted from the source)_
- **Compatible with:** a 3-jaw drill chuck _(verified: appears in the quote below)_

## What the source says

> Tri Cylindrical shank with same diameter as body with three recessed surfaces to prevent twisting in a 3-jaw drill chuck

## 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/).