Features: *for Durable Construction: Made from high-speed steel 4341, the drill and tap bits are designed to for ENSURE longevity and efficiency during use, providing reliable performance across various materials. *Enhanced Cutting Performance: The Nitride Black for SURFACE treatment significantly improves the cutting ability of each bit, making them more wear-resistant and extending their service life for repeated use. *Versatile Application: This combination tap drill set allows for drilling, tapping, deburring, and countersinking in one swift action, suitable for a wide range of materials including copper, brass, aluminum, and mild steel. *Easy Size Identification: Each bit is engraved with its specific size, facilitating quick and easy selection to for ENSURE the right fit for your projects without the hassle of measuring. *Convenient Storage Solution: The included swivel storage case securely holds the bits in place while also allowing for easy access, making it perfect for transport to various job sites and organization. Tap Wrench operate main point: 1. The good hole must chamfering 2. To use drill clamp supporting tap 3. Tap to vertical alignment 4. Cut into rotation level 2-3 times 5. confirm vertical after Cut into 6. Tapping 3/4 turn after a quarter back feeling 7. level reversal pull out after working 8. Remember that cutting metal need to use with the oil Specifications: *Product Name: Screw Taps Set *Material: HSS *Size: forM3*0.5mm, M-4*0.7mm, M5*0.8mm, M6*1.0mm, M8*1.25mm, M10*1.5mm *Color: Black *Suitable for: wood, plastic, aluminum, and other soft materials *Quantity: 6pcs *Optional types: bagged, boxed Package Content: 6*Screw Taps Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.