Woodworking cutter set $ 16.12 Model: 15 1/4 handle yellow, 15 1/4 handle yellow in bulk Ball head diameter: (mm) 25 Min cutting diameter of center (mm): 25 Contour radius (mm): 25 Cutting diameter (mm): 12 Maximum cutting depth: 25 Number of effective cutting edges: 2 Function length (mm): 25 Shank form: round Diameter of shank (mm): 6.35 System: British system