Need to carry more ice screws? Add an insert sleeve to your High Mountain Gear Screw Cannon to increase your capacity as much as 25%.
- Protects threads and teeth.
- Can also be used on their own (best secured with a cord once screws are inserted).
The 2 Screw Insert can be used in either sized Cannon, but the 4 Screw Insert can only be used in the Large Cannon.