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.