Reverse Counterbore: 11/16" Dia, 5/16" Pilot Hole, 4 Flutes, High Speed Steel MPN:190-8L

A reverse counterbore drill bit is an efficient tool used to drill flat bottom holes while preventing the part from spinning or walking on the table during operation hence resulting in high precision and speed for industrial tasks. This HSS version, with a diameter of 11/16, has a pilot hole size of 5/16 along with 4 flutes for smoother cutting, perfect for use in aircraft structures where accuracy is required, manufacturing facilities and any application that calls for tight tolerances for fastening devices. Its durability saves money and time as it holds its sharpness over longer periods resulting from the heat resistance of High-Speed Steel material used making it suitable in industries requiring precision such as aerospace or automotive assembly lines for manufacturing high quality products that meet rigorous industry standards.