Milwaukee 48-89-9284 Cobalt Step Drill Bit #4 (3/16-7/8")

Milwaukee 48-89-9284 Cobalt Step Drill Bit delivers precision drilling across multiple hole sizes in a single tool. The #4 size steps from 3/16" to 7/8", eliminating the need for multiple bits and reducing setup time on the job. Engineered from cobalt steel, this step bit resists heat buildup and maintains sharp edges through demanding applications in steel, aluminum, and composite materials. The graduated flute design ensures clean entry and exit holes with minimal burring. Ideal for HVAC technicians, electricians, and fabricators who need reliable performance in production drilling and hole enlargement work. Fits standard drill chucks for quick installation and changeover.