Irwin Hanson 10502CB Cobalt Unibit Step Drill Bit Set, 3-Piece M35 HSS

The Irwin Hanson 10502CB Cobalt Unibit 3-Piece Set delivers professional-grade step drilling performance for electricians, plumbers, HVAC technicians, and metalworkers. Constructed from M35 Grade High-Speed Steel with 5% Cobalt, these step drill bits offer superior heat and abrasion resistance for extended cutting edge life, even in hard metals and stainless steel.

Key Features:

• M35 Grade HSS Cobalt (5%) — Provides exceptional heat and abrasion resistance for the longest cutting edge life in its class
• Speedpoint® Tip — Fast-starting precision tip that begins cutting up to 6x faster than the original Unibit design, reducing walk and improving accuracy
• Laser Marked Sizes — Permanently engraved size markings that will not wear off with repeated use
• Radial Concave Flute Design — Produces true round holes with maximum control and minimized vibration for a cleaner, more accurate cut
• 3-Flatted Shank — Triple-flatted shank design prevents slipping in the chuck for secure, reliable power transfer
• Blue Marking Collar — Highly visible color-coded collar allows for easy identification of the correct bit during use

This 3-piece cobalt Unibit set is ideal for drilling clean, burr-free holes in sheet metal, thin steel, aluminum, plastic, and other materials. The step bit format eliminates the need for multiple drill bits, allowing a single tool to drill a range of hole sizes with precision and speed.