The 8" Bionic Grip is one of the most versatile gripping tools available. It combines the adaptability of the Bionic Wrench with an open head and internal locking mechanism. It automatically adjusts to fit 13 sizes of fasteners as well as pipes and tubes from 1/2-inch to 13/16-inch. And while traditional gripping tools can damage and distort pipes and tubes, the Bionic Grip"s jaws surround two-thirds of the surface for a distributed and balanced grip.