Here is my hex key holder machined from aluminum and made to attach to the 10E or 10ER headrest. I've been using it for 6 months or so and it works very well. Itholds the standard handle 1/8", 5/32", 3/16" and 1/4" hex keys plus the small handle 3/16" for the motor mount screws and the 1/8" ball driver for the table insert adjustments. I'm not making these for sale right now but my add this to the line soon if I can figure out a way to make them quicker to keep the price down.