Adjustable: 5 positions

5 positions. CLAMPING PERFORMANCE: High clamping performance, comparable to a vice. Clamping capacity, adjustable with rack. Scroll wheel to adjust the clamping power. Easy motion of the axis. Soft locking device. Easy unlocking with only one hand by using the red lever. JAW PERFORMANCE: High resistance to wear thanks to the chrome-vanadium forged steel jaws. Powerful clamping thanks to the jaws' teeth on the whole length. Round pieces easy to tighten in axial position thanks to the slot on the upper jaws. Clamping of any shape thanks to the articulated jaws with straight and round teeth.