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Countersinks & Counterbores


Countersink and counterbore tools create holes for fasteners to sit flush with or below the surface of a workpiece. Countersinks make cone-shaped holes that accommodate the head of a screw or rivet. They’re also used for chamfering and deburring. Counterbores increase the diameter at the mouth of a pre-drilled hole, creating a seat for a fastener.

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