A strong carabiner can be made independently with a small set of locksmith tools. For crafts, you will need a wire and a long nut.
After the ring is almost bent, you need to tighten the nut, for this, the thread on both sides of the steel bar is pre-cut.
The final part will be grinding and painting to your liking. A homemade carbine that turned out to be much stronger than Chinese counterparts and cheaper than branded products.