When a bolt head or nut needs to be recessed, because it cannot protrude from the work surface, or you want to bung the hole over the fastening, then this counterbore is the tool for the job. After the hole for the bolt or screw has been drilled, this counterbore is used to cut a larger hole around the first one. The counterbore shaft must be the same diameter as the bit used to drill the original hole, as it will guide the cutter to make a perfectly centered round recess. To find precisely-sized bits to match the bore guide shaft, have a look at our auger bit page! As with the auger bits, the counterbore requires a powerful drill to cut the relatively large diameter hole. This will make for a quick, clean and easy job.
|12 mm||30 mm||312660||✱€ 72.90|
|12 mm||40 mm||312661||✱€ 83.90|
|15 mm||30 mm||312663||✱€ 72.90|
|15 mm||40 mm||312664||✱€ 83.90|