Step Drill Bit Set - 3PCStep Drill Bit Set 3PC This Milwaukee Step Drill Bit Set comes with three high quality bits that let you drill precision holes at professional speed. These bits feature dual fluting that drives away double the dust and debris to prevent jams. The fluting also increases drill speed, which saves you time and battery life. Black oxide coating increases the durability of these step drill bits for metal by reducing the heat from friction and keeping them