Used for precision drilling and milling. Collet closing chuck grips the collet when tightened. Includes the threaded back plate, 14Mx1 mounted.Holds Swiss collets 1/64" through 5/16" from set # 152-200, not included with this listing. Uses type E16 or ES16 collets or compatible.
Note: This does not fit the Unimat DB or SL lathes which require a threaded 12Mx1 backplate. The camera flash creates the copper color showing in the listing, no rust. Please review the photos since they are part of the description. Contact me with any questions prior to purchasing.Thank you for your interests.