Designed to hold pen blanks for drilling on the lathe. They are also used for holding other square stock up to 1-1/8". The jaws measure 1" diameter when closed and 1" tall Can be used as a pair of two jaws or with four. Serrations on the outside hold securely when expanded in a pre-drilled hole.
Grips: 1/2" to 1-1/8" sq. Expands: 1" to 2-3/8"
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