Includes two complete units: one for shrinking (p/n 4135), and one for stretching (p/n 4136). Shrinks and stretches metals, Shrinks metal down to a 2" or 3" radius. Works and forms metal up to and including 16 gauge. Mounts easily in vise, or on a bench or stand. Jaws are reversible to increase usage. 23 lbs (10.5Kg) shipping weight.