A lot guys have made chuck keys that were truly works of art so this is crude in comparison. I needed a pair of chuck keys to help me get my 4 jaw dialed in so I went to Home Despot and picked up 3 ft of 3/8 square stock for a few bucks. I really didn't have the time for turning, milling and welding. While I was at it I made a T wrench for the socket head screws holding the lathe bits in my QCTP. I was tired of fiddling with those little allen keys. Not pretty but it was cheap, quick and they work well.