Bosch BL2147 5/16″ Black Oxide Sp Jobber (Carded)

Crafted by Bosch, this 5/16-inch x 4-1/2-inch fractional jobber drill bit features a durable black oxide coating that not only enhances its longevity—lasting up to 50% longer than traditional high-speed steel—but also facilitates smoother drilling through a variety of materials. Its innovative speed helix design allows for three times faster drilling compared to standard bits, making it an efficient choice for both professional and DIY projects alike. Suitable for working with a wide range of materials including steel, aluminum, and various woods, this bit is a versatile addition to any toolbox, designed specifically for use with a minimum chuck size of 1/2 inch.