--- product_id: 67230007 title: "Spiral Grooved Step Drill Bit Set, High Speed Steel Titanium Coated, 4mm to 12/20/32 mm (5/32\" to 5/4\") Hex Shank Metric, HSS Cut Tool Set for DIY Plastic Wood Metal Aluminum Copper" brand: "diwuji" price: "€ 28.23" currency: EUR in_stock: true url: https://www.desertcart.hr/products/67230007-spiral-grooved-step-drill-bit-set-high-speed-steel-titanium store_origin: HR region: Croatia --- # Hex shank fits securely in 1/4" drill chucks, no slip Titanium-coated HSS for ultimate durability & wear resistance Two-flute spiral groove for smooth, fast cutting Spiral Grooved Step Drill Bit Set, High Speed Steel Titanium Coated, 4mm to 12/20/32 mm (5/32" to 5/4") Hex Shank Metric, HSS Cut Tool Set for DIY Plastic Wood Metal Aluminum Copper **Brand:** diwuji **Price:** € 28.23 **Availability:** ✅ In Stock ## Summary > 🔩 Drill Smarter, Not Harder — The Ultimate Step-Up for Your Toolbox! ## Quick Answers - **What is this?** Spiral Grooved Step Drill Bit Set, High Speed Steel Titanium Coated, 4mm to 12/20/32 mm (5/32" to 5/4") Hex Shank Metric, HSS Cut Tool Set for DIY Plastic Wood Metal Aluminum Copper by diwuji - **How much does it cost?** € 28.23 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/67230007-spiral-grooved-step-drill-bit-set-high-speed-steel-titanium) ## Best For - diwuji enthusiasts ## Why This Product - Trusted diwuji brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact & Ready to Go:** Comes in a sleek nylon bag for easy storage and portability—perfect for on-the-go pros and DIY enthusiasts alike. - • **Secure Fit, Zero Slip:** Hex shank design locks firmly into your drill chuck, giving you maximum torque and control on every project. - • **One Bit, Multiple Hole Sizes:** Step design lets you drill 4mm to 32mm holes without swapping bits—streamline your workflow and save time. - • **Built to Last with Titanium Power:** High-speed steel core coated in titanium delivers unmatched hardness and wear resistance across metal, wood, plastic, and more. - • **Precision & Stability in Every Cut:** Two-flute spiral grooves ensure faster, cleaner drilling with automatic chamfering for professional-grade finishes. ## Overview This Spiral Grooved Step Drill Bit Set by XQ7 features a high-speed steel core with titanium coating for enhanced durability and wear resistance. Its unique two-flute spiral groove design enables faster, smoother drilling with automatic hole chamfering. The 1/4" hex shank ensures a secure fit in most power drills, eliminating slip during use. Covering hole sizes from 4mm up to 32mm, this versatile 3-piece set is ideal for drilling through metal, wood, plastic, and more, all packed neatly in a protective nylon bag for convenience. ## Description Spiral Grooved Step Drill Bit Set, High Speed Steel Titanium Coated, 4mm to 12/20/32 mm (5/32" to 5/4") Hex Shank Metric, HSS Cut Tool Set for DIY Plastic Wood Metal Aluminum Copper ## Features - 【Two-Flute Spiral Groove Design】Enables a faster, more stable and smoother cutting. It can automatically chamfer the hole to clean the drill bit. ●Only sales from XQ7 are quality guaranteed. Before placing order, please confirm product sold by XQ7. - 【HSS & Titanium Coated】Made of super strong HSS steel and coated with Titanium, Titanium coating ensures easy cutting steel, Aluminum sheet, Brass, Copper, plastic, wood etc. - 【Hex Shank】1/4"(6.35mm) hex shank work with most drill or drills with 1/4" chuck , fits into power tools chuck securely and eliminates slip. - 【Application】Suitable for sheet metal, sink, car repair, etc. Widely used to cut holes in a variety of material like plate, aluminum, insulation board, PVC board, the thickness of wood within 5mm. - 【Convenience】Step drill allows to cut several sizes hole with one drill bit, easily without changing bit constantly. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07C35LW73 | | Batteries Required? | No | | Batteries included? | No | | Best Sellers Rank | 49,816 in DIY & Tools ( See Top 100 in DIY & Tools ) 23 in Step Bits | | Customer Reviews | 4.3 4.3 out of 5 stars (2,519) | | Date First Available | 10 April 2018 | | Finish | Aluminium, Brass, Titanium | | Item Package Quantity | 1 | | Item Weight | 220 g | | Item model number | VL | | Manufacturer | XQ7 | | Material | High Speed Steel (HSS) | | Number of Pieces | 3 | | Package Dimensions | 11.9 x 10.5 x 3.5 cm; 220 g | | Part number | VL | ## Product Details - **Cutting angle string:** 118 Degrees - **Cutting diameter:** 32 Millimetres - **Finish type:** Aluminium, Brass, Titanium - **Material:** High Speed Steel (HSS) - **Shank type:** Hex ## Images ![Spiral Grooved Step Drill Bit Set, High Speed Steel Titanium Coated, 4mm to 12/20/32 mm (5/32" to 5/4") Hex Shank Metric, HSS Cut Tool Set for DIY Plastic Wood Metal Aluminum Copper - Image 1](https://m.media-amazon.com/images/I/515szh1vC1L.jpg) ## Questions & Answers **Q: Silly question but do the numbers denote the mm it will cut?** A: Yes, keep cutting till you reach that number which gives a fairly accurate hole size. Take care not to cut on too fast speed. I find good results when I use a slight circular motion when drilling as this helps not to overload the drill motor and also helps not to damage the cutter in the event of a jam. **Q: Will these bits go through 6mm iron?** A: I would strongly suggest that you go through with a pilot drill first depending on what size you want to make the hole in you 6mm steel. It’s always best to start off with smaller drill size and just work up. The spiral grooved bits will take you to the diameter you want. One more tip if you haven’t got any cutting paste in your kit buy some it really helps and saves blunting your drills. I do hope this helps you?! **Q: what type of drill do you need** A: I've used it with both a corded and a cordless drill. Really depends on the hardness and thickness of the wood or board you're drilling through. **Q: Can I use this drill bit to put a hole in my chimney breast to pass wires down?** A: The drill bits are to widen an already existing hole. The work best on metal but would also work with plastics and wood. Not suitable for brickwork. ## Frequently Bought Together - Spiral Grooved Step Drill Bit Set, High Speed Steel Titanium Coated, 4mm to 12/20/32 mm (5/32" to 5/4") Hex Shank Metric, HSS Cut Tool Set for DIY Plastic Wood Metal Aluminum Copper - Bosch Professional 18pcs. HSS Twist Drill Bit PointTeQ (for Metal, in ToughBox, Ø 1-10 mm, Accessory Drill) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/67230007-spiral-grooved-step-drill-bit-set-high-speed-steel-titanium](https://www.desertcart.hr/products/67230007-spiral-grooved-step-drill-bit-set-high-speed-steel-titanium) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-20*