Bosch BL2175 Drill Bit Black Oxide, 3/4"Highlights: Diameter: 3 4"" Overall Length: 6" Each metal drill bit is manufactured to exacting specifications and features a split point that starts on contact with no walking or skating, eliminating the need for a center punch Offers superior durability, speed and selection to support most general purpose applications Speed helix design for three times faster drilling than standard bits Easier drilling, reduced heat and extended drill bit life For