WireTwister
Have you ever tried to twist two thick wires together, but the wire kept on slipping in your fingers? No more! This is the WireTwister! It's a drill bit attachment that secures the wires with 2 2-56 screws and allows you to twist the wires together with ease!
I've included the Inventor file so you can change the screw hole to match any of your screws!
UPDATE: https://www.youmagine.com/designs/wiretwister I've moved this design to YouMagine.