This tool on Horotec 64.371 is used to hold screws by the head when shortening, polishing or rounding the thread. Includes three chucks - sizes 0.40mm, 0.60mm, 0.80mm and a steel holder with coated handle.
Holds screw by the head while you work on the thread
Three chucks included: 0.40mm, 0.60mm and 0.80mm