N3EDJ Pen Blank Jaws, Square Hole Inside for Charnwood Nexus3 Chuck

Amazon

Pen Blank Jaws, square hole inside for Nexus3 Chuck. The internal edge is V shaped, forming a square when closed, perfect for gripping square or round pen blanks. The jaws project 56mm from the base plate. Expands from 28mm to 58mm. Contracts from 38mm to 11mm.

Zoro Tools

Charnwood Pen Blank Jaws, Square Hole Inside for Nexus3 Chuck N3EDJ