Annular Cutter Set, Imperial, 916 Minimum Cutter dia, 1516 Maximum Cutter dia, 7 pcs, Cobalt, Bl (Discontinued)

Nitro Broach cutting using Drillco cutters means you can produce large dia holes efficiently and quickly with less energy, faster penetration and less thrust Rather than drilling out the metal with a solid drill, Drillco cutters remove only the periphery of the hole, ejecting a slug at the end of the cut