Manfrotto 123 Clamp Pivoting for Booms for 35mm diameter boom shafts 28mm Stud, 16mm socket

Ercole M11-051 Umbrella Swivel Adapter with adjustable cold shoe.

Not strictly a tripod head, but an extremely versatile camera support for compact and 35mm cameras used in conjunction with Super Clamp 035. Supplied with quick release camera plate and secondary safety lock.

Due to its spring loaded clamping, this cold shoe clamp enables one to one-handedly mount shoe fitted equipment very easily. Its finger screw serves both as a push knob for opening the clamp and for tightening down the clamping securely.
It fits the standard shoe sizes of 18, 20 and 22mm.
The Cold Shoe Clamp is tapped with 1/4″-20 and 3/8″-16 holes on the back side