Air Hammers
If you're still using a chisel and hammer to bash your way through material then it's time for you to catch up with modern times. Using an air hammer is the best way to chip through the most difficult materials. Even if you have to chisel through tile that is held together with adhesive meant to last 100 years, these tools can handle it. Air hammers are nothing without the right chisels, so be sure to pick some up along with your tool.
If you're still using a chisel and hammer to bash your way through material then it's time for you to catch up with modern times. Using an air hammer is the best way to chip through the most difficult materials. Even if you have to chisel through tile that is held together with adhesive meant to last 100 years, these tools can handle it. Air hammers are nothing without the right chisels, so be sure to pick some up along with your tool.