Our Center Drill Bit Set offers a wide range of sizes, high-speed and solid construction, and a 60-degree angle for accurate center holes. Made of premium quality high-speed steel, this set is suitable for use with lathe machines and electronic drills, allowing you to work with tough materials. Tips for optimal use are also included. **Features:** 1. **Wide Range of Sizes Available:** Cutting Diameter x Length: 1 x 33mm, 1.5 x 33mm, 2 x 40mm, 2.5 x 44mm, 3 x 70mm, 4 x 70mm, and 5 x 70mm options are available to meet diverse needs. 2. **Accuracy:** The 60-degree angle center drill is ideal for drilling precise center holes, 60-degree countersink holes, or starter holes for larger drill bits in metalworking applications. 3. **Premium Quality:** Our center drill bits are constructed from high-speed steel, ensuring a solid, high-temperature, and wear-resistant performance. 4. **Wide Applicability:** Compatible with lathe machines and most electronic drills, these bits are designed for drilling holes in steel, iron, aluminum, carbon steel, brass, and other tough materials ranging from 170HB up to 200HB. 5. **Tips for Using Center Drill Bits:** * Securely fix the workpiece deep within the lathe machine to prevent wobbling during rotation. * Remove any acid from the surface before drilling and use oil or a suitable lubricant to protect the bits. * A good rule of thumb is to drill to a depth of 2/3 of the tapered section. * Stop immediately if the drilling sound is abnormal and address any issues before resuming. * Clean the center drill bits before and after drilling, and apply oil for proper storage. **Specification:** * **Material:** High-Speed Steel * **Color:** Silver * **Product Size:** Cutting Diameter x Length: 1 x 33mm, 1.5 x 33mm, 2 x 40mm, 2.5 x 44mm, 3 x 70mm, 4 x 70mm, 5 x 70mm * **Product Weight:** 2g, 3g, 5g, 7g, 12g, 19g, 30g **Package Included:** * 1 x Center Drill Bit