I made a lot of holes with a drill in the notch of the concrete yow wall and tried to make the work efficient but it took a long time to penetrate the gravel stone and finally it was a concrete hammer.
On 2017-08-17 19:08:28
As concrete only like mortar, maybe work progressed smoothly? There is no nonsense from the beginning from the beginning, and drills are not suitable for preparation under fishing if they are used for drilling.
I used it to take out the fence strut buried in the concrete block. Whether sharpness is good or only in rotation mode there is quite excavating power. This time I opened holes in 4 places but it seems to be still used. I was satisfied as my goal was achieved.
Reshaping the tip for rotation and opening a hole to penetrate the tile roof ridge, the problem is that the tip will come off due to heat melting of the brazed part, because it can not inject water into the building, take time Is it only necessary to open a hole while cooling it?
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