Theres a peice of 15mmx4mm wraught iron bar bent in a U with a 8mm tapped hole on one side. The hole has a peice of threaded bar with another peice of wraught iron bar cut and drilled for the handle. The two clamping plates are a peice of stainless 32mm ish exhaust tube cut in half with a door hinge welded on so the plates can move. one of the plates is welded onto the U shaped peice and the bolt screws down onto the plate that can move. The plates have got a layer of 3-4mm rubber glued onto them, i'll see if I have a better photo of the clamp.