Super sharp point lip and spur drill to give positive hole starting in chipboard and laminates. Depth stop ring can be moved up and down the drill bit shank to give a range of different pilot hole drill depths, and the large ring can be moved independently over the countersink body to vary the countersink depth so that you can tailor it to the screws you are using and get them exactly flush, or sunk exactly as you need them.
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