11120000 Threaded crown set G 6 pcs.

Usage:
Set of thread crowns for process-safe removal of broken taps. The thread crowns, comprising 3 or 4 ridges, are inserted into the flute of the broken tap and can thus be unscrewed by turning against the direction of the thread without further damage.

M4, M5, M6, M8 - 3 ridges
M10, M12 - 4 ridges