For manual or overhead CNC router machines. Shank ø20×50 mm. The chucks AP08M DA3 and AP08M EA9 are suitable for mounting tools with bore ø20 mm, while the AP08M BB9 for mounting tools with bore ø30 mm. The AP08M BB9 includes an anti-rotation ring nut and the housing for the screws that fasten the tools to the chuck.