High precision vise with spring action jaws. To insert a hook, simply squeeze the lever to open the jaws and porition the hook in the jaw. When you release the lever the hook will be held firmly in the vise. The hardened steel jaw is designed to hold hooks ranging from tiny size 28 to mighty 5/0 saltwater hooks with no adjustments. Other features: lever with anatomic handle, 360 degree rotation with dual precision ball bearings, double diameter handwheel, adjustable rotary tension, locking position to 0 degrees, adjustable tying angle, adjustable height. The lever can be set up for both left and right handed use. Supplied with pedestal base, spring material clip, allen keys and instruction manual.