QIS is our patented system of downthrust vise jaws, consisting of several different quick-change jaw inserts that mount on a single base jaw. Jaw inserts are held in place by a guide pin and two permanent magnets (V Jaw Inserts, Side-Stop Jaw Inserts, and Soft Blank Jaw Inserts have a bottom groove instead of a guide pin for precise sideways location on the vise guideways). Jaw inserts can be changed in a few seconds. The base jaw and jaw inserts have a matching angle between them to provide downthrust action. This downthrust effect ensures that the workpiece is held firmly down against the vise to a precise zero point, providing extremely accurate height location.

Base Jaws are firmly fastened to the vise using socket-head cap screws. To install jaw inserts, slide insert along the vise guideways until the guide pin engages the groove in the base jaw and is held by the permanent magnets. To remove, pull the jaw insert upward until the guide pin reaches the top of the slot, then tilt the insert forward to overcome the retention force of the permanent magnet.

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