Milwaukee THUNDERBOLT™ 31/64" Black Oxide Drill Bit features a thick core web that provides protection against side-load breakage, making it a durable choice for tough drilling tasks. Its corrosion-resistant coating enhances lubricity and extends the bit’s lifespan. The parabolic flute design efficiently clears chips and debris while keeping the bit cool during use. Equipped with a 135° split point tip, this drill bit prevents walking and ensures precise hole placement and easy starts. It requires less effort to drill through metal, wood, and PVC, and performs well on curved surfaces. I for use with portable drills, this bit combines strength and precision for reliable performance. Model Number: 48-89-2737