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Specialised drilling gear such as CFA or continual flighted augers and displacement augers are something we have a bit of.

CFA is basically a long auger you drill to depth and pull out in one go while pumping concrete down the centre shaft as you pull out.

Displacement is where you screw an auger down a hole and it pushes the spoil out and leaves a void which you either fill with stone making a stone column or grout our concrete.