Vintage Cast Aluminum Mannequins Head Holder Master Appliance. I've never seen one of these before but when I Google imaged it, came up as a. Mannequins Head Holder table clamp it clamps tight to edge of table but the protruding part that holds the head moves around pretty easily. Not sure if that is the way it's supposed to be or not. It is in very good condition with only minimal wear which is shown in the pictures