Sherline Machining Tools Sherline 2.5" 4 Jaw Chuck 3/4" - 16 thread

The Sherline 2.5" 4 Jaw Chuck 3/4" - 16 thread designed to have all the jaws move in unison. The jaws are driven by a spiral scroll when the knurled ring is turned. Self-centering chucks will never duplicate the accuracy that can be attained with jaws that are moved independently, but they will usually “get the job done,” saving a machinist much time and effort.