www.pmmag.com/articles/89490-reed-s-hot-tapping-machine
Reed's Hot Tapping Machine
February 16, 2006

Use Reed Mfg.'s DM3MECH mechanical drilling machine to hot tap. It contains the drilling machine, along with 7/16-inch hex arbor, 1/4-inch drill bit, seven hole saws, allen wrench and tool box.