The 30 Caliber Machine Gun Bullet Cartridge Pen Kit Bushing Set consists of two identical bushings. The bushings are threaded onto the 7mm mandrel and use small stepped extensions that insert into the brass pen tubes and center the tubes on the mandrel. The larger diameter barrels of the bushings serve as a gauges that tell you the size to turn the pen blanks to the correct barrel diameters.
|Projects Used On:||30 Caliber Bullet Cartridge Twist Pen,30 Caliber Bolt Action Bullet Cartridge Pen, Mini 30 Caliber Bolt Action Bullet Cartridge Pen|
|Compatible Tube Sizes:||3/8″|
|Pieces in Set:||2|