Discover the Precision 3-Piece HSS 4341 Spiral Flute Step Drill Bit Set, designed for exceptional performance in precision hole drilling. This set includes three high-speed steel drill bits with double spiral flutes that ensure efficient swarf clearance, preventing clogging and allowing for smooth, accurate drilling of up to 18 different hole sizes. **Features:** - **High-Speed Steel Construction:** Crafted from durable HSS 4341 for longevity and reliability. - **Double Spiral Flutes:** Engineered for optimal swarf clearance to avoid clogging. - **Versatile Sizes:** - Size #1: Ø4-12mm - Size #2: Ø4-22mm in 2mm increments - Size #3: Ø4-30mm in 2mm increments - **Convenient Storage:** Comes in a sturdy flip-up metal case for easy organization and portability. **Specifications:** - **Net Weight:** 0.49kg - **Size Breakdown:** - Size 1: Ø4, 5, 6, 7, 8, 9, 10, 11, 12mm - Size 2: Ø4, 6, 8, 10, 12, 14, 16, 18, 20, 22mm - Size 3: Ø4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30mm At our online store, we offer a comprehensive selection of tools and workshop equipment for DIY enthusiasts and professionals alike, with over 10,000 products available for all your project needs. If you need assistance finding the right tool, our dedicated customer service team is here to help you!