The single-bottom drills is suitable in turns on lathe digs the drilling machine to sneak in the surface shallow layer the silty soil, grittiness silty soil, soil layers and so on clay, or sneak in the detritus massive limestone, the tuff and so on. The drill bit base fights the tooth ledger wall and the use loose leaf attachment by the single belt closes the putty mouth in above two steel plate constitution, therefore named flat keel drill bit. The characteristic is the structure is simple, the ease of operation, sneaks in the first floor to affect in a big way, cannot use in the sand bed and so on drilling tiny strata.

It is suitable for Bauer Germany or Sany Drilling machines!!