Practicable test

Due to the elimination of time-consuming drill hole
cleaning by using hollow drill bit, only about half the
installation time is required compared to conventional
hammer drills. 

When using the fischer hollow drill bit, additonal parallel
work, e.g. in the electronics area, is possible due to the
clean working environment. This increases productivity
on the construction site.

Furthermore, costs for the cleaning equipment like cleaning
brush, blow-out pump or compressed-air cleaning
tool will be omitted.