12Pcs Step Drill Bit & Tap Set - 6Pcs HSS M3-M10 Composite Tapping Drill, 3Pcs Titanium Coated Sawtooth Twist Drill, 3Pcs Metric/SAE Spiral Groove Step Cone Drill for Metal Wood Plastic

🛠️ Say goodbye to the hassle—one set takes care of all your drilling needs! (One set is all you need to meet all your drilling needs!)

Whether you’re a professional craftsman or a DIY enthusiast, this 12-piece multifunctional drill bit and tap set is the ultimate must-have for your toolbox. Combining step drills, serrated twist drills, and composite taps, it perfectly handles drilling, reaming, chamfering, and tapping in a single step. Save time and effort—one tool does it all, significantly boosting your productivity!

✨ Key Features
1. All drill bits are made of high-quality high-speed steel (HSS) and feature a gold titanium coating. This reduces friction, ensures rapid chip removal, and provides heat resistance and wear resistance, significantly extending service life.

2. Drill, tap, and chamfer in a single step! No need to frequently change drill bits. The unique spiral flute design ensures smooth chip evacuation and prevents tap breakage. Suitable for M3–M10 standard threads.

3. Specifically designed for wood, plastic, and thin metal. The 135° fully ground cutting edge is sharp and burr-free. The serrated side design enables fast cutting and grooving, ensuring quick and precise drilling.

4. Multi-diameter step design with clear size markings. The 1/4-inch hex shank ensures a secure, slip-free grip and is compatible with most handheld power drills and bench drills. Widely used for drilling and reaming thin sheet metal, aluminum, wood, and PVC.

📏 Product Specifications
Package Includes: 12 pieces

Step Drills x 3:

4–12 mm (Small)

4–20 mm (Medium)

4–32 mm (Large)

Sawtooth Twist Drills x 3:

3 mm, 6 mm, 8 mm

Composite Taps x 6:

M3 (0.5 mm pitch), M4 (0.7 mm), M5 (0.8 mm), M6 (1.0 mm), M8 (1.25 mm), M10 (1.5 mm)

Shank Specifications: All feature a 1/4-inch hex shank (All 1/4" Hex Shank)

💡 Suitable Materials (Wide Application)
✅ Metals: Steel sheet, aluminum sheet, copper, stainless steel (low speed and cutting fluid recommended for thin sheets).
✅ Non-metals: Wood, plastic, PVC pipe, acrylic, insulation board, etc.
(Note: When tapping or drilling metal, it is recommended to use cutting fluid and maintain a low speed for best results.)

🔍 Frequently Asked Questions (FAQ)
Q: Can these drill bits drill through stainless steel?
A: Yes, but since stainless steel is quite hard, we recommend using a lower RPM and be sure to use cutting fluid (or machine oil) for cooling and lubrication. This will maximize the drill bit’s lifespan and ensure smooth hole walls.

Q: Can composite taps be used directly on thick metal without pre-drilling?
A: Composite taps have a built-in drilling function, but for metal thicker than 3 mm, we recommend first pre-drilling a pilot hole with a smaller drill bit (or using a step drill to set the hole) before using the composite tap. This makes tapping easier and helps prevent the tap from breaking.

Q: What is “saw-and-drill-in-one”?
A: This refers to our serrated twist drill. It is not only a drill bit; its serrated structure on the side can also be used for quickly cutting wood edges and slotting (enlarging holes)—one tool, two uses.