Exactly reproduce wheel-well flanges, compound dog legs, trunk corners, and almost anything requiring the combination of a curve and an angle. Produces curves as tight as 3" radius. The hand lever multiplies your pressure, allowing the hardened steel jaws to form mild steel up to 18 gauge, stainless steel up to 20 gauge, aluminum up to 16 gauge. Clamps in your vice, mounts to your bench or pedestal. The Set includes a Shrinker Jaw, a Stretcher Jaw and one housing.