JDG Stainless Steel 2 Piece Ring Cores - 6mm Channel Adapter Pen kits are available separately

Pen kits are available separately

The body and bolt action mechanism is the same as you will find in PSI's original and best-selling Bolt Action pen kits and uses all the same accessories

Exterior Measures Approx 13

Height: 8"

Minimum Maximum External Compression 1-3/4" 3-1/4" Internal Expansion 2-3/8" 4"

JDG Stainless Steel 2 Piece Ring Cores - 6mm Channel Adapter Pen kits are available separatelyJDG 2 Piece Ring Cores Stainless Steel 6mm JDG ring kits are a favorite among ring makers who cater to high end jewelry shops and collectors. Made of certified stainless steel, JDG rings feature a radiused interior profile that makes them comfortable to wear daily. The unique two piece press together design provides an excellent fit and finishes with a nearly invisible joint when assembled. If desired, JPG ring kits are supplied with a brushed satin