Compact but awkward
The compactness of this tool is also its disadvantage - it claims to be "ergonomic" but it's quite awkward to hold firmly enough to have confidence to strike anything hard. The finger grooves don't really work as your hand naturally falls into a position where your little finger sticks out on the side where you need to strike! It clips around a seatbelt, but does not grip the belt at all - it will just slide down to the anchor. Might work better stuck inside the door pocket using self-adhesive velcro.
