Uxcell Tap Drill Bit Set, 1Pcs 7/16-14 Unc Straight Flute Thread Taps And 1Pcs Descriptions: Tips: Drill holes with a twist drill bit first, then tap with a thread tap. The tapping angle should be 90 degrees vertical and stable. The higher the hardness, the slower the speed. Fast speed with small torque; slow speed with high torque. Product Features Tap Drill Bit Set: Tap thread size: 7/16-14 UNC (right hand); twist drill bit size: 9.4mm (right hand). 6542 (M2) high speed steel tap and drill bit set offers excellent heat resistance and hardness for durability and longevity, and good cutting performance for clean, precise holes. Wide Applications: Thread tap and drill bit kit can create new threads or re-thread damaged or jammed threads. Straight flute tap is suitable for through holes or shallow blind holes. Used for cast iron, aluminum, stainless steel, carbon steel, aluminum alloy, bronze and hard plastics. Features: Thread Tap: Straight flute design, clear threads and no burrs, downward chip removal, fast and precise tapping. Machine tap is used in drill presses, tapping, CNC and milling machines. Not recommended for hand use and electric drill tapping. Twist Drill Bit: Spiral flute chip space design to remove chips quickly and cleanly. Provide neat and smooth cuts. Black Oxide: Black oxide coating on thread tap and drill bit set improves durability, corrosion resistance and lubricity, and helps reduce friction and heat, extending tool life. Use with tapping oil to get higher quality threads and more durable taps. Use an appropriate lubricant to reduce friction and heat build-up. Tips: Drill holes with a twist drill bit first, then tap with a thread tap. The tapping angle should be 90 degrees vertical and stable. The higher the hardness, the slower the speed. Fast speed with small torque; slow speed with high torque. The tapping depth should not exceed 1.5 times the diameter of the tap. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!