Make quick and easy 6-40 TinyTight tubing assemblies with this new tool. The tool is specifically designed for use with the Upchurch Scientific M-647 and M-657 Ferrules, 6-40 threaded M-644-03 Nut and 1/16" OD tubing. To use, first place the tool in a vise, then tighten tubing, fitting and ferrule into the tool as you would into any port. Once removed, the swaged ferrule will be held in place on the tubing.