The "The James Brand" brand Halifax is a handy tool for use that can be attached to a keychain. It is small and light because it was made of titanium. Only the disc as the pressure point for opening the bottle is made of stainless steel and can be.
The Zippo serves as a size comparison and is not included in the delivery.
Properties:
6AL-4V titanium
Total length 72mm
Width 18mm
Can be used as a screwdriver (slot)
Can be used as a bottle opener
Can be used as a scraper