The Milwaukee Thunderbolt Cobalt Drill Bit is engineered for demanding applications in hard metals like stainless steel. This 5/32-inch jobber bit features cobalt construction that resists wear and maintains its cutting edge significantly longer than black oxide alternatives, reducing the need for frequent bit changes and keeping your projects moving forward.
The reinforced core construction resists breakage during heavy-duty use, while the bit’s design prevents wobble when cutting through dense material. The 135-degree split point tip prevents walking and delivers precision starts. The variable helix design promotes rapid chip removal and limits heat buildup to keep the bit sharper longer, providing up to 10 times the life of black oxide drill bits.
Features and Benefits
- Cobalt Construction: Resists wear and heat buildup during extended drilling in hard metals, delivering up to 10 times the life of black oxide bits.
- 135-Degree Split Point Tip: Prevents walking for accurate hole placement and fast starts.
- Reinforced Core: Enhances longevity and prevents breakage during heavy-duty drilling applications.
- Variable Helix Design: The aggressive helix angle promotes rapid chip removal and limits heat buildup to keep the bit sharper longer.
- Overall Length: 3.13 inches for standard jobber bit applications.
- Skin-Carded Packaging: Durable packaging protects the bit during storage and transport.
Specifications
- Brand: Milwaukee
- Model: 48-89-2307
- Bit Diameter: 5/32 inch
- Shank Diameter: 5/32 inch
- Overall Length: 3.13 inches
- Bit Type: Jobber bit, twist flute, 3-flute
- Material: Cobalt
- Tip Style: 135-degree split point








