The spiral-grooved geometry with 3 cutting edges ensures extremely high stability of the «Solid 3S» solid drill, thus preventing the risk of breakage of the cutting edges by overloading or jamming of the chips. Thanks to the high stability, the service life of the «Solid 3S» is considerably increased. This reduces the costs of use. The «Solid 3S» enables drilling to full dimension without centring or pre-drilling. The «Solid 3S» can be ground more simply than core drills of the same diameter.