![](/fileadmin/images/hero-banner/service/heller-tools-banner-service-quality-levels.jpg)
Quality levels
Market segmentation with customer orientated quality
(e.g. hammer drilling)
![Prefix](/fileadmin/images/content/service/quality-levels/heller-tools-service-quality-levels-classic.jpg)
Classic
The entry level of professional drilling.
![Bionic Pro](/fileadmin/images/content/service/quality-levels/heller-tools-service-quality-levels-professional.jpg)
PROFESSIONAL
Long service lives and powerful drilling progress for professionals at the construction site.
![Trijet](/fileadmin/images/content/service/quality-levels/heller-tools-service-quality-levels-professional-plus.jpg)
PROFESSIONAL PLUS
The premium segment of Heller. The drill bits in this series meet the highest demands of professional users in terms of speed, robustness, and ergonomics.