Bosch BL2143 1/4″ Black Oxide Sp Jobber (Carded)

This 1/4 In. x 4 In. fractional jobber drill bit from Bosch is expertly designed for versatile use across a range of materials including steel, aluminum, brass, and various woods like oak and maple. With a black oxide finish, it not only enhances durability but also reduces friction, enabling cooler operation and significantly prolonging the bit’s lifespan—lasting up to 50% longer than standard high-speed steel bits.