View Full Version : Hard Coral

08/30/2017, 02:55 PM
I am trying to drill through hard corals and neither concrete bit or high speed steel will touch it.....anyone drill really hard coral

08/30/2017, 04:13 PM
You have the drill in reverse :)
No seriously.. you are not doing something right or your concrete bit its dull as can be..
And even then you should be able to get through it..

seriously.. I think you have it in reverse..
Wait.. you are using a drill right and not just spinning the bit by hand :p

08/30/2017, 08:03 PM
Your funny

Went out and bought a diamond bit, worked good....thanks for the help!