This is a hand held vinyl holder that I designed to clamp over the label on vinyl records to use a air compressor to blow off the records while not harming the label. It worked great for me. I just used a coarse bolt and threaded it thru the handle and had the bolt sticking up thru and then used a wing nut on it to clamp the shell on top.
Be sure to use higher infill for the top clamp piece or else it will bow in when tightening the nut down.
The author hasn't provided the model origin yet.