Meet the BOSCH BL4135 1/8 In. x 2-3/4 In. Fractional Jobber Black Oxide Drill Bits — precision twist bits designed for fast starts, long life, and versatile performance across metals, wood, and plastics. If you crave a clean start without fuss, Bosch’s split-point design has your back (no center punch required).

Key Features & Design

• Split point starts on contact with no walking or skating, eliminating the need for a center punch.
• Speed helix design for three times faster drilling than standard bits.
• Last 50% longer than high-speed steel.
• Bit Diameter 1/8 In.
• Length 2.75"
• Bit Type Twist
• Minimum Chuck Size Required 3/8 in
• Surface Coating Black Oxide
• Bit Material Black Oxide
• For use in steel, copper, aluminum, brass, oak, maple, MDF, pine, PVC, polycarbonate, acrylic, ABS, nylon and composite materials
• Available in jobber length, stubby length, extended length (aircraft), 1/2 In. reduced shank (Silver and Deming)

The Bosch line of metal drill bits offers a solution for every professional application, and the BL4135 is no exception—built to exacting specs to help you work smarter, not harder.