Drill chuck capacity range 0.15 to 4.0mm with adapter for 8mm watchmaker lathe.

Please select option list for thread sizes available.

WW standard american 0.275 x 40 fit most all 8mm lathes such as: Bergeon, Levin, Derbyshire, Boley, American Watch Tool Co., Peerless, Marshall, and most others.

And metric size M7 x 0.75 such as Vector and HOROTEC German brand. Please check my store for other parts.