Manufactured from HSS-E steel to DIN 371/6.For blind holes.Taper lead to DIN form C (2 x P to 3 x P).Tapping tolerance to 6H.Suitable for the following Material Groups: 1.1 to 1.5, 3.3 to 3.4, 6.3 to 6.6, 7.1 to7.3, 8.1