Stubby bit driver handle for 1/4" bit holders

I modified the original file to accept a 1/4" bit holder better durability and better usability. The version i printed had too tight fit for the bit holder, so i had to heat up the bit holder quite a bit, so i increased the tolerances a little bit, so it should be easier to insert the bit holder now. If you still find the fit too tight you can heat up the bit holder for easier insertion.