What do you mean by pit drills?
Now the general common is BOSCH 4 yuan of the pit, the pit is a few hammer tail of the pit, in addition to the most common domestic Fang Sikeng is in accordance with BOSCH's four yuan pit, there is the United States DEWALT 5 pit
Upstairs misleading people ha! Electric hammer drill: four (two round pit pit two groove (two) five pit pit three slot) is BOSCH's patent Kazakhstan, Kazakhstan is not DEWALT! There are homemade square four pit and six corner bit! If you drill with reinforced concrete, or suggest that you use four blades of drill, one will not drill bit, and the two is the drill bit and machine life longer!
