Crown drills made of special steel HSS-XE + surface treatment GOLD-TECHSET CONTENTS:Usable length 30 mm,Weldon shank 19 mm (3/4),6 HSS-XE core drills:1 piece each with diameters of 12, 14, 16, 18, 20, 22 mm2 ejector pins 6.34×77 mmFEATURES:Made from highly alloyed special steel HSS-XE. For exceptional hardness at the tooth tips [up to 68 HRC]. Therefore, high wear resistance and long tool life.GOLD-TECH surface treatment: special treatment for longer tool life.Fully ground from the entire material. This fine grinding increases cutting performance while reducing friction. For longer tool life.Only a few manufacturers can produce hardened core drills in stages.For us, this is standard. This achieves exceptionally hard tooth tips [68 HRC] while still maintaining flexible core drills.Seven different cutting geometries, optimized according to the diameter and depth of the core drill cut, ensure maximum cutting performance.APPLICATION:Due to the special surface treatment GOLD-TEC + full grinding + special steel HSS-XE, it is excellent for drilling in steels up to 900 N and also suitable for stainless steels.

Weldon19 adapter to DIN 238 B16 taper for attaching a drill chuckUsed for clamping the drill chuck on magnetic drilling machines