It's got a drill chuck inside the motor head and that's what spins the auger bit and there's a bushing underneath that locks the chisel in place. When you pull the handle of the machine, you drive both cutters down into the workpiece and that's what cuts that square hole
Chisel mortiser Machine used for Square hole drilling in wood, 1pc10mm Chisel bit complimentary.� it's making 150 mm ( 6 inch ) Hole .
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