Crown lezviyny for the BKPM 40-25 puncher

Are intended for shock and rotary drilling of shots by figurative punchers with energy of blow to 90DZh in strong and very strong (f to 20) monolithic rocks of high abrasivity.
Have conical connection with a bar (7º and 12 °), in the case there is an opening for washing. Usually all hard-alloy cutting plates, including krestovy drill bits or dolotchaty, can be newly perfected, at wear of the hard-alloy cutting plates.