Legacy Woodturning, European Pen Kit, Many Finishes, Single Kit Finish: Gun Metal Type: Ballpoint Twist Pen Drill Sizes used: 7mm; Compatible Tube; Sizes: 7mm Skill Level: Average; Blank Size: 5/8 x 4-3/4; Refill Type: Cross Style European Bushings will fit this pen kit; Bushings and blanks sold separately