10K707 up for sale is a very nice set of  4 pieces made of plastic  hobby clamps new from factory surplus. made in the USA. made by molds inc holland ohio,  these are over 6 inch wide when fully open also package says no rubber bands required 3/8 x 2 inch jaws full 6 inch opening serves as an internal clamp by reversing the sliding jaw and stop clamp, 5 pounds max pressure, with addition of 3/8 weather strip clamp will hold on irregular surfaces, this comes in plastic bags with factory tag ,  buyer to pay ZERO shipping and packing to your USA location. see our store for more stuff like this. Thank you RWK.