Electrical box tie-in
	This is the electrical cable end clamp that hangs onto a 3-phase box. A kind of threaded twist lock insulated alligator clamp. Also known as a 'tie-in cable set' or just 'tie-ins.' ...courtesy of John Anthony

Elvis
	Checkerboard Grifflectors in gold and white.

Extension Arm (see it)

Extension Arm, Gobo Arm, Grip Arm or Extension Grip arm all refer to a tube with a 2-1/2" Grip Head permanently attached. The Matthews Extension Arm has a Stainless Steel shaft with a 5/8" outside diameter which allows a standard baby light fixture to be mounted on it and used as a boom. Other manufacturers who do not adhere to our tight tolerances, do not always allow the mounting of light fixtures on their Extension Arm. Matthews offers the Extension Arm in both 40" and 20" lengths.