A remix of antoooooooooooonie's headphone mount to accommodate the metal frame supporting the wooden top of my desk. The 15mm thick desktop was supported by a 25mm (1") square tube frame. The mouth of this clamp is ~42mm to accommodate this and comes with an extended screw to clamp onto the thinner wood behind the frame. antoooooooooooonie's model already had the screw-hole far enough back as to not interfere with the 25mm metal frame. I simply extended the mouth and the screw.