6-Piece HSS Titanium-Coated Combo Tap Drill Set — Drill / Tap / Deburr 3-in-13-in-1 FunctionalityEach bit completes drilling → tapping → chamfering in a single operation, minimizing tool changes and saving time. Suitable for materials like copper, brass, aluminum, plastic, and thin steel sheets. Quick-Change Hex ShankFeatures a 6.35 mm (1/4") hex shank compatible with electric drills, impact drivers, bench drills, screwdrivers, and tapping tools for easy and secure bit changes. Durable HSS + Ti CoatingCrafted from HSS 4341 high-speed steel and finished with a titanium (gold) coating for enhanced sharpness, heat resistance, and cutting performance. Anti Over-Drill DesignThe tapered tip absorbs impact while the rear taper prevents excessive drilling and helps protect the threading for smoother operation. Complete Metric SetIncludes M3×0.5, M4×0.7, M5×0.8, M6×1.0, M8×1.25, and M10×1.5 sizes. Each piece is clearly laser-marked for quick identification. Made for On-Site JobsPerfect for tasks involving metal sheets, repairs, installation, and DIY where quick hole creation and threading are needed on soft metals or plastic.Specifications Product 6-piece 3-in-1 Drill–Tap–Chamfer Combo Set Material HSS 4341 high-speed steel Finish Titanium (gold) coating Shank 1/4" (6.35 mm) quick-change hex Sizes (Metric) M3×0.5 (~54 mm) / M4×0.7 (~55 mm) / M5×0.8 (~56 mm) / M6×1.0 (~56 mm) / M8×1.25 (~57 mm) / M10×1.5 (~58 mm) Work Materials Copper, brass, aluminum, thin steel, plastic ( not suitable for hardened or high-hardness stainless steel ) Functions Drilling, tapping, chamfering/deburring Package 6 multifunction tap bits (M3 to M10); packaging based on actual product Use Tips Operate at low speeds, use cutting oil, apply light pressure, and back out to clear chips; best suited for sheet or thin material FAQQ1: Can these be used on stainless steel?A: These are ideal for non-ferrous metals and mild sheet steel. For harder stainless or thick metal, opt for cobalt-grade bits and operate at low speeds with sufficient cooling.Q2: What speed is recommended?A: Low RPM is best (typically 300–800 RPM on a hand drill). Always use cutting fluid and apply steady, light pressure while clearing chips regularly.Q3: How can I avoid stripped threads or broken bits?A: Start with a center punch and maintain a 90° angle. For thin sheets, complete the tap in one smooth pass if possible. During tapping, advance 1–2 turns, then reverse half a turn to clear chips—avoid forcing it.Q4: Is separate chamfering needed?A: The built-in deburring tip lightly chamfers during tapping, helping guide threads more smoothly.Q5: Any special chuck required?A: The 1/4" hex fits directly into quick-change chucks. For standard 3-jaw chucks, tighten firmly on the hex shank and eliminate any play to prevent slippage.
