Has held up well with me

I am satisfied with the crown. After 150 holes in pumice hollow blocks and 100 in Ytong the drill bit is now at the end. For the construction of a detached house with very good Elektoausstattung the lifetime has passed. But be careful, observe the instructions of the rotary hammer.
This crown is actually used until a 4 kg hammer. With the large 2.8 Hammer drilling were also possible but it is slower. In medium heavy pressure, the slip clutch of the machine triggers, but this is not the drill bit, but the purse (did not want a 4 kg hammer) responsible.