HT-1950 Copper Pipe Crimping Tool with 3 Jaw Sizes (1/2", 3/4", 1") for Hydraulic Pipe, Tee Fittings, and Narrow Spaces â Compatible with Nibco, Elkhart. 3-IN-1 Versatile Jaw Set â Includes 1/2", 3/4", and 1" jaws for crimping copper pipes of multiple sizes.