... package includes ;3 core drilling machines 20 core drill bits 1 extension barVacuum base and pumpHose, Allen ... drilling holes from 8mm ~102mm. 4. 20 diamond core drill bits .20,22,24,28,50,63,76 ... Vacuum base and pump,suitable for the general purpose drill. Ideal for indoor use on finished surfaces. ... Also saves time not having to drill anchor holes. 7. Hose for water connection , allen keys and spanner ...