Features: Crafted from premium high speed steel (HSS), these straight shank twist drill bits deliver exceptional durability and high performances drilling in metal, wood, and plastic. Precisions ground cutting edges and straight shank ensure secure grip in drills, minimizing slippage while offering multiple sizes (1.5mm-6.5mm) for multipurpose applications. Designed for DIY hobbyists and professional contractors requiring reliable tool for precise drilling tasks in workshops or job sites. Tackle home repairs, furniture assembly, automotive projects, or industrial fabrication with clean, accurate holes across diverse materials. The included compact storage case safeguards drill bits from damage and simplifies organization, ideal for mobile toolkits or workshop benches. Specifications: Material: High-speed steel (HSS) Color: As pictures shown. Storage Box Size:Approx. 133x75mm/5.24x2.95in Drilling for: iron sheet, aluminum sheet, wood and plastic, not for carbon steel or stainless steel Package Includes: 13 piece Drill Bits note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.