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Spade bits, also sold as flat bits, bore holes in timber and boards with a drill or driver. Every bit here has a hex shank, either 6mm or 1/4in, and several sets use 150mm bits. Flat wood drill bit sets run from a 6pc 10-25mm spade drill bit set and a 6pc 6mm hex set to a 13pc set, a 14pc 6-25mm set and a 7pc spade bit set covering 10-40mm.

For deeper holes there is a 25mm extra long bit at 400mm and a 10pc set with a 300mm extension. An 80mm adaptor extension also lets 6mm hex shank wood bits run in an SDS drill. Start slowly so the centre point locates before the cutting edges bite, and match the bit size to the pipe, cable or dowel you are fitting.