Thumb wrench

No wrench? No problem! This compact tool lets you screw large nuts and hex-shaped parts, such as the part holding the cartridge in mixing faucets (see gif/pictures). This model is sized for hex parts with a diameter of ⌀ 33.5 mm and a fillet of 3 mm, which were my faucet's hex-shaped part's measurements. If you need a different size, you can scale the model in your slicer.The fit is very tight (zero tolerance) on purpose to guarantee safe, steady handling. If this doesn't work for you, you can add tolerance by scaling it a bit in the slicer.