The Mega-Combo Wrench is designed to keep you out of trouble! How many times have you needed to move a light, but you didnÃ t have a wrench? The Mega-Combo has a hole to attach to your key-chain, or drop it in your pocket so you can always keep it handy! The Mega-Combo will allow you to move the light from pipe to pipe, tighten the pan bolt, and lock the tilt on most fixtures. It will even lock the small side square headed bolt on 99% of the old cast iron lighting clamps and will also fit the bolts of the Micro-Clamp. (Fits bolt head sizes: hex 3/4" & 1/2" square 1/2" & 5/16") The Mega-Combo weighs only 1.4 ounces and is 2-3/4" long. It is machined from solid aluminum alloy to be trouble free for years and has a bright burnished finish.