Reverse Counterbore: 1/2" Dia, 3/16" Pilot Hole, 4 Flutes, Solid Carbide MPN:191-5K

The reverse counterbore is a premium tool designed for drilling large pilot holes with unparalleled accuracy and precision. It has a diameter of one half-inch with a three-sixteenths' pilot hole and comes in handy when preparing holes for screw applications where no knurl will be left after fastening. Manufactured using solid carbide, the counterbore delivers high performance by minimizing heat buildup, burs or wobbling during operation making it suitable for aerospace, automotive, and other critical applications requiring exactness in results. Overall, this tool is a valuable addition to the counterbores' range, offering excellent drilling solutions without leaving any knurl behind on the screws once fastened.