SUP board screwdriver for US BOX fin

My supbord uses a fin with a US box attachment. There is a convenient screw on the fin for mounting with a wing. However, it is difficult to unscrew it after riding, because the screw slips in your hand.  To avoid this, I made a small flat screwdriver, with which you can easily unscrew this screw. In order not to lose the screwdriver during use and between rides, a hole with a diameter of d = 5mm is made in it, into which any carabiner must be inserted (with or without a ring. I used a carabiner with a bar thickness of 4mm, purchased on the marketplace (for those who have the opportunity to purchase on Ozon, here is the link:

https://www.ozon.ru/product/karabiny-malenkie-5-shtuk-dlya-klyuchey-sumok-povodkov-tsvet-chernyy-2071630610/)

Design by temach1978 on MakerWorld (license: BY).