For use in concrete, masonry and natural stone.

On-the-job tests made under extreme conditions confirm that the DON Rotary Hammer Drill Bit's design 4 PLUS sets standards in terms of efficiency and performance.

This product has proven itself in the shortest possible time on millions of occasions. It has redefined the demands made of a professional rotary hammer drill bit.

The 4 PLUS significantly raised the performance parameters of drilling speed and life expectancy.

This considerably reduces the user's cost per drilled hole. Modern heat-treatment procedures and a special surface finish reduce drill bit wear and improve resistance to bending forces. Constant research guarantees excellent uniform material structure and extremely tough soldered joints.

4 PLUS - 4 significant advantages
.Due to its aggressive design, the fast and durable carbide tip allows easy
 centring and spot drilling - not even reinforced steel presents a problem.
.The dynamic, chisel-shaped drill bit head rapidly penetrates the material,
 simultaneously channelling the drilling dust into the multi-flute spiral.
.The patented, high-volume, multi-flute KVS-spiral quickly channels the
drilling dust from the hole, saving both time and money in the process.
.The unique reinforced flute geometry (KVS-flute) reduces vibration and
 transfers more impact energyfrom the rotary hammer to the drill bit head,
 increasing both drilling speed and life expectancy. Reduced stress for man
 and machine.