The drill bit meets my needs perfectly. Have sculpted in tough garage concrete floor to mount a metal rail on garage entrance there. That was partly filigree and worked excellent. The craftsman who has replaced the old garage door against an electrically operated Sektionalrolltor Hörmann, did not really serve up this work; Therefore I bought the chisel. Craftsmen are just not even what they once were. Like to do only work that is clearly calculable because of work hours and avoid handicrafts because they have it not enough staff capacity and the risk is too great that the result is also accepted by the customer. I'm going with the Einhell hammer nor my concrete slabs (lying in mortar on a concrete slab) embarrassed novel. Here was formerly fudged by Plattenleger because the mortar is not the entire surface is below the plates. In the interstices then lifts ice in winter the plates, and the plates tilt when walking over or drive. This work is the Einhell chisel without problems leisten.Für my requirements I would give the drill bit the grade 1.