I absolutely love using hex bits in my impact driver whenever I possibly can but they usually come in a cheap holder that the bits fall out of or with no holder at all! I designed this bit holder to press in 6x3mm neodymium magnets which securely retain the bits while still being easy to remove the bits when needed. Installing the 6x3mm magnets is really simple. No print pausing necessary! Simply stick the magnet on the back of the 1/4" hex shank bit and press it into the pocket in the print.