General Electric's Security business offers its TRAC-Tube intelligent key storage device, which helps secure unattended, standalone access points. TRAC-Tube is the latest addition to the TRACcess line of electronic key control and entry tracking systems, which offers a more secure and convenient alternative to issuing and managing mechanical keys or access cards on site. TRAC-Tube holds up to two keys and access cards and provides a robust audit trail on users. It is accessed and powered by a TRACkey. The stainless steel TRAC-Tube recesses into a wall with a minimum thickness of seven inches and is secured with mortar, cement or epoxy. The tube measures 3.32 inches (85mm) in diameter and 6.63 inches (168mm) in overall length.