Expanding Jam Chuck Set - (5 Piece) Fountain Pen Kits 3/4"X16tpi adapter included

3/4"X16tpi adapter included

Makes a great gift - no matter your sign

and desk decor shoppers alike

smooth action click mechanism found (the same that is in the  Vertex pen kits)

Mandrel: 7mm pen mandrel

Expanding Jam Chuck Set - (5 Piece) Fountain Pen Kits 3/4"X16tpi adapter includedExpanding Jam Chuck Set (5 Piece) Numerous turning projects require a jam chuck however hand turning the chuck is time consuming and not always accurate. This system solves the jam chuck problem. Insert the system s tough rubber chuck into your work then expand it by turning a nut to conveniently secure the workpiece. This remarkable package includes five chucks. SIZES: 3 4", 1", 1 1 4", 1 1 2", and 2".