Ø 18 mm, cutting depth: 30 mm - core drill made of high-performance high-speed steel. Suitable for steel (such as I-beams, large sheets), cast steel, non-ferrous and light metals. An advanced cutting geometry has achieved significantly improved cutting behavior, positively impacting cutting performance and tool life. Optimized cutting geometry for increased chip removal performance and reduced cutting forces. The chip angles are designed for universal use with various steel grades. Improved chip removal through U-shaped chip ejection. The special geometry of the ejection reduces the thermal stress on the HSS core drill, as the heat generated during machining is largely dissipated with the chips. Reduced friction between the HSS core drill and the workpiece through optimized, spiral-shaped guiding phases. Usable in all column and magnetic stand drilling machines with Morse taper in combination with RUKO holder No. 108 302 / 108 303 / 108 315 / 108 316, the RUKO EasyLock No. 108 312 / 108 313 / 108 314, or with Weldon shank direct holders such as RUKO magnetic stand drill RS5e / RS10.