GREEN RING TwinBox Machine Tap + Twist Drill, DIN 371, HSS-E, M 4 x 0.7 

for general use - non abrasive material up to 1.000 N/mm² - unalloyed and low alloyed steel - Malleable Cast Iron and Zinc Alloys - for blind holes HSS-CO Twist Drill DIN 338 Type N right, 118° - Spiral: 25-30° Thread type: metric ISO-thread DIN 13 Norm: DIN 371 Material: HSS-E