11.5 mm, 0.4528, Black Oxide Drill Bit, 135 Degree Split Point, M2 High Speed Steel, Jobber Length, Black Oxide Coating Cools & Lubricates Bit For Longevity, Split Point Minimizes Walking.
1/4x4 MM/BLK OX Bit
1 7/8" Hole Dozer Saw
7/16" Shank Spr Mandrel
2.5" Hole Dozer Hole Saw