This fine adjustment tool post &. Was manufactured in England for the professional machinist around the year 1980. Made for and fits only the Unimat DB200 & SL1000 lathes. Used for very fine adjustment for very small detailed work. Mounted on the cross slide by T-nut. Used for taper turning. Cone (taper) angle is adjusted with circular scale. Mounted tool holder is made so the tool bit can be clamped in any desired position. Made of solid steel with brass bushings & wedges. 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.