40pcs HSS Tap & Die Set

Made from M2 grade High Speed Steel M2 grade steel has a good red-hardness and retains its cutting edge sharpness longer than other general purpose high speed steel, but not as shock resistant or as flexible as other HSS grade with less tungsten. Sets furnished in metal or plastic ...Made from M2 grade High Speed Steel M2 grade steel has a good red-hardness and retains its cutting edge sharpness longer than other general purpose high speed steel, but not as shock resistant or as flexible as other HSS grade with less tungsten. Sets furnished in metal or plastic case Thread Type Thread Size Range NC 4-40, 6-32, 8-32, 10-24, 12-24, 1/4-20, 5/16-18, 3/8-16, 7/16-14, 1/2-13 NF 10-30, 1/4-28, 5/16-24, 3/8-24, 7/16-20, 1/2-20 NPT 1/8-27