Square key knob for toilet paper dispenser (6 mm square)

A square key to open toilet paper dispenser with a 6 mm hole.

Scaled down at 87% to have the square sides at 6 mm, fillet edges and added a keychain ring.

Thanks Ifrit for the original model.

scaled down at 87% to have the square sides at 6 mm, fillet edges and added a keychain ring