4-42 mm HSS Step Drill Bit for Soft Metal Wood Plastics Drill Attachment Cone Drill Cutter Multi-Stage Drill

• Very adaptable: thanks to the specially manufactured shaft, our HSS step drill fits in all cordless screwdrivers and drills: Bosch, Makita, Einhell etc. Sits securely in any drill chuck
• Fast drilling progress. Thanks to the precisely ground cutting edges and the self-centring tip, you can achieve a fast and even drilling progress.
• 【Material】Made of HSS 4241 and titanium coating to reduce friction and heat, suitable for workpieces with a hardness below 25° and materials such as metal, wood, aluminium alloys, plastic plates, insulation boards, etc. Tips: cool during use with water.
• Drilling without dancing: the self-centring tip and precise cutting of the cone drill bit mills specifically into the material without running. The straight tension grooves provide optimal chip ejection
• Double edge structure: 135° split tips and double fluted construction, the double-edged construction allows faster, more stable and even cutting. Recommended drilling speed: 250-400 rpm

Use tips: 1. Wear when using an electric drill. Always use protective glasses, mask and gloves. 2. Do not touch it with your hands, as the drill heated during use and there is a risk of burning. 3. It is recommended to oil the drill before each use. Please do not set the drilling speed too high to avoid damage to the cutting edge. 4. Please note that when using the metal plate of the Product drill fill the product with water for cooling. must be used. Due to the high temperature, the step drill can be easily softened. Drilling under water cooling can effectively extend the life of the drill. 14 sizes: 4 - 42 mm (4, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42 mm) Commonly used to make holes in a variety of Materials such as steel, wood, thin iron, aluminium alloy, insulation boards, PVC panels and more. Package contents: 1 x HSS Step Drill Bit 4-42mm