Strong hardness and good durability, which greatly improves the cutting of the drill, is more wear resistant and prolongs the service life Small resistance, smooth chip removal, smooth cutting surfaces, with good machinability, it can tap to button of blind hole Greatly saves processing step and time costs, improves working efficiency. The tapered end prevents excessive impacts, and the rear tapered over the tap to prevents thread damage Flexible to be use, processing efficiency, good stability, widely used, low processing cost, can be apply to a variety of job Sharpness and durability, the cutting strength is high, Manufacturer: REITINGE