The KnKut 15pc HD M35 Cob Jobb. Drill Bit Set 1/16"-1/2" by 32nds (15KK35) is engineered for efficient drilling in the most challenging and high-tensile materials. Crafted from M35 Cobalt High-Speed Steel, these drill bits incorporate 5% cobalt, providing superior heat resistance and extended tool life compared to conventional drill bits. This set is specifically designed to perform reliably when working with materials that typically cause rapid wear on standard tooling, ensuring consistent results and a lower cost per drilled hole over time. Whether you are working on critical applications or everyday tasks involving robust metals, this KnKut set provides the precision and durability required for professional results. KEY FEATURES AND BENEFITS: Exceptional Material Composition: Made from M35 Cobalt High-Speed Steel, ensuring high resistance to heat and abrasion for prolonged sharpness and bit life. Precision Drilling: The 135° split point tip initiates drilling on contact, preventing bit "walking" and eliminating the need for a preliminary center punch or pilot hole. This design creates accurate, round holes. Secure Chuck Grip: Features hex shanks on all bits from 3/16" and larger, significantly reducing slippage within the drill chuck, particularly during demanding drilling operations in hard materials. Enhanced Heat Resistance: The unique straw finish (black oxide/salt nitride treated) further strengthens the bit's surface, allowing it to maintain its cutting edge even under high temperatures generated during aggressive drilling. Versatile Application Range: Specifically formulated for effective use in a wide array of tough and work-hardening materials including stainless steel, high-strength alloy steels, titanium, manganese steel, armor plate, and inconel. American Craftsmanship: Proudly manufactured in the USA, reflecting a commitment to quality and precise engineering standards. SPECIFICATIONS: Material: M35 Cobalt High-Speed Steel (5% Cobalt) Drill Bit Sizes Included: 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 15/64", 1/4", 17/64", 9/32", 19/64", 5/16", 21/64", 11/32", 23/64", 3/8", 25/64", 13/32", 27/64", 7/16", 29/64", 15/32", 31/64", 1/2" Shank Type: Round shanks for sizes under 3/16"; Hex shanks for sizes 3/16" and above Point Angle: 135° Split Point Finish: Straw Finish (Black Oxide/Salt Nitride Treated) Length Type: Jobber Length Included in Product: 15 individual M35 Cobalt Jobber Length Drill Bits in a protective index case HOW TO USE: Select the Correct Bit: Choose the appropriate drill bit size from the set for your intended hole diameter. Secure the Bit: Insert the drill bit into your drill chuck. For bits 3/16" and larger, ensure the hex shank is firmly seated to prevent slippage. Tighten the chuck securely. Prepare the Workpiece: Secure your material firmly to prevent movement during drilling. No center punch is required for these bits. Set Drill Speed: Adjust your drill's RPM (revolutions per minute) according to the material you are drilling. Generally, harder materials require slower speeds. Begin Drilling: Apply consistent, firm pressure. Allow the 135° split point to initiate the hole without walking. Maintain Pressure and Lubrication (Optional): Continue drilling, maintaining steady pressure. For extended bit life and cleaner cuts in very hard materials, consider using a cutting fluid or lubricant. Clear Chips: Periodically withdraw the drill bit slightly to clear chips from the hole, especially when drilling deep holes, to prevent heat buildup and maintain cutting efficiency. Complete Hole: Once the hole is drilled through, slowly withdraw the bit while the drill is still rotating to prevent burring. BENEFITS OF USING KNKUT 15PC HD M35 COB JOBB. DRILL BIT SET 1/16"-1/2" BY 32NDS (15KK35): Provides clean, precise holes without initial wandering. Extends drilling performance in materials that typically dull bits quickly. Minimizes setup time by eliminating the need for pilot holes. Offers a secure, non-slip fit in the drill chuck, enhancing safety and control. Reduces overall tooling costs due to exceptional longevity. Maintains cutting effectiveness under high heat conditions. Reliable performance in specialized industrial and fabrication applications. FEATURES: Specialized geometry designed for aggressive and efficient drilling. Thickened core structure enhances breakage resistance. Precision-machined flutes optimize chip clearance and flow. Friction-reducing coating supports smoother and cooler operation. Built to endure repetitive use in industrial-grade environments. Conveniently housed in a rugged index case for organized storage and easy access.