The Light Source Mega Combo Wrench (Blue) The Aluminum Mega Combo Wrench is great for the lighting technician on the go! Fits great onto a keyring for easy access to adjust lights as needed. Able to quickly and easily adjust C-Bolt Clamps (1/2" & 3/4"), Pan Bolt, Source 4 Barrel Knobs, and more! A true lighting technician should never leave home without one- the Mega Combo Wrench is fantastic for everything lighting, all while being able to fit in the palm of your hand. Blue Aluminum makes this tool stand out above the crowd.