The optional Shark Jaws feature a serrated surface that gives a strong grip on the workpiece that will not let go. The top 1/4" of the jaws can be used for contracting on a dovetail spigot or expanding into a dovetail recess. The jaws are 1-1/16" deep.
Grips:1-3/8" to 2-3/8" Expands:1-7/8" to 3-1/4"
Jaws may differ slightly from picture
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