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tunnel bits

Premium-milling cutter for professionals.

Thanks to the special high-alloy steel, the Starbreaker SDS-max core drill bit features very good drilling performance. Precision work: even in deep drill holes, the Starbreaker leaves an exact hole geometry.

Percussive energy is transferred to the tool without loss

Low weight

Reduced vibration

Long tool life

Exact drill hole geometry




natural stone

sand lime brick

hammer drilling

hst hardened

Hammer drilling in concrete, sand-lime brick, natural stone, brickwork, clinker.

The special technique of hardening by blasting makes for the perfect surface finish: the probability that a Heller hammer bit will break under very high loads is extremely low – even on impact with reinforcements. Ideal, especially with long dimensions: HST hardening guarantees high bending flexibility without breaking.

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