Bosch BL4155 7/16″ Black Oxide Sp Jobber 3/8″ Red (Bulk)

Engineered for efficiency and longevity, the 6-piece set of 7/16-inch by 5-1/2-inch black oxide drill bits from Bosch features a speed helix design that enables three times faster drilling compared to standard options. The advanced black oxide material not only enhances durability, allowing these bits to last 50% longer than traditional high-speed steel, but also minimizes heat buildup during operation, which contributes to an extended lifespan. These versatile bits are suitable for a wide array of materials, including metals like steel and copper, as well as various woods and plastics, making them a reliable choice for both professional and DIY applications. With a jobber length ideal for reaching deeper holes, this set is an essential addition for anyone looking to enhance their tool collection with high-performance drilling solutions.