Materials:
I used:
-Hobbii Rainbow Cotton 8/4
-Size 2.5mm hook
-Darning Needle
-Stitch Marker
-Keychain
Feel free to use whatever yarn you like with the corresponding hook size. Larger yarn and hooks may be too big for a keychain. Cotton is most durable, but it’s your craft and your choice :)

Abbreviations:
MR - magic ring
Sc - single crochet
Inc -use invisible increase (sc in the back loop of the next stitch, then sc in both loops of the same stitch)
FO - Finish off
Mattress Stitch - weave through both loops on either side back and forth invisibly