4-cutter hammer drill bits

[bruce56]

For rotary hammers, you can get 4-cutter drill bits. They will drill more quickly into concrete. That is for the SDS or spline shank used for rotary hammers. But as for 4-cutter bits for plain hammer drill bits? I have only seen the Projahn brand, which not many sttock.

[tabbypurr]

They make far less sense for old fashioned hammer drills, since they need twice the force to work.

NT