Features and Benefits:

• Superior quality machine tooling made from USA M42 cobalt.
• Cuts up to a Rockwell (Rc55) Steel, twice that of other drill bits
• Micro-edge for walk-free machining and quick penetration
• Short length for tight areas, thin web for fast clean drilling and chip clearing
• Meets and exceeds most tooling specifications including Aerospace. .125” Dia. +.000” - .002” (Premium Quality)


Drilling through extremely hard material including Titanium, Boron, Ultra-Strength, and even Stainless Steel is easy with ProMaxx Tool's Premium Gold Drill Bit Tooling Machine-Shop-Grade - PMXSSSC420. These drill bits exceed Aerospace Specifications. These are the best drill bits for drilling out exhaust studs and more.Drilling metals introduces many challenges including the hardness of the metal, accessibility, and the thickness of the material. Finding quality, long-lasting drill bits to meet the above conditions is becoming more difficult today.Our gold tooling is machined turned right here in the USA and engineered to not only handle a wide variety of material types and hardnesses but it is also manufactured to a specific tolerance to ensure the most accurate and trouble-free drilling today. That is why we call it tooling, the same high quality used in high-speed machine shop operations.As a technician, we know your time is valuable, so we designed our bits to punch through quickly and accurately to deliver the predictable results you expect.Also available in our 29 piece drill bit set, in 1/64 in. increments.TIPS FOR USE� Bump your drill repeatedly to establish a center point and prevent walk� Use drill and tapping fluid to prevent over heating and promote cutting (included in ProKit)� Follow recommended RPM