If you are trying to chisel a path where you want to plant cables or pipes in a wall for a renovation or start holes in concrete you should begin with the smaller bit.
How to chissel a concrete wall.
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Use electric jackhammers and electric rotary hammers to chip it away.
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For concrete 6 inches 15 cm or less in depth circular saws and cut off saws can do the trick.
If you re thinking of cutting concrete for projects like sidewalks patios and basement walls the proper tools and a bit of effort can save you from spending money on a contractor.
Things like small houses patios and small storage sheds will have concrete approximately 2 to 4 inches thick.
Make the path then step up the bit to a larger one until you attain your target size.
To pound 2 to 4 inch walls you can use a demolition hammer.
Jackhammers are powerful pounding tools with various chisel like tips to break up concrete.