Toooooooooo EZ man !!
Go to Home Depot, or your fav hardware store.
Purchase a 5/8-11 Hex Head Bolt, length doesn't matter much, minimum of 2" length though. Get 2 ea 5/8-11 nuts to go with it. Put both nuts on the thread of the bolt, locktite them and also torque them together, locking them HARD.
There is your tool, and costed you under $1.00.