Features: 1. durable Alloy Blend: Made from strengthened alloy for 30% higher toughness. Efficiently penetrates stainless steel/iron plates. Reduces wear, suitable for industrial & DIY use. 2. Hex stem for Secure Fit: The hex stem design ensures compatibility with various power tools, providing a stable grip with a load capacity of up to 150Nm. This feature reduces the chance of bit slippage during use, making it ideal for both professionals and hobbyists to improve work efficiency. 3. Accurate Drilling System: The helical shape ensures precise hole alignment, with drill diameters ranging from 1.5mm to6.5mm to meet diverse application needs. It resolves deviation problems when drilling different materials, suitable for woodworking, metalworking, and more. 4. Heat and Rust Resistance: A unique coating allows the drill bits to withstand temperatures up to 300°C, reducing deformation and damage caused by high heat. This ensures reliability during extended use, perfect for demanding professional environments and increasing safety during tasks. 5. Portable Multi-Piece Set: Includes five different-sized drill bits to handle various tasks, with a total weight of only 400g for easy transport. This design addresses the issue of lacking tools, making it suitable for workshop repairs, home renovations, and other scenarios, improving work adaptability. Specifications: Material: Alloy Dimensions: Drill Blade Diameter: 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm. Drill bit handle diameter: 1/4" Hex (6.35mm) Attributes: 13-piece set Applicable scenarios: Metal alloy processing and drilling Package Includes: 1.5mm drill bit x1 2mm drill bit x1 2.5mm drill bit x1 3mm drill bit x1 3.5mm drill bit x1 4mm drill bit x1 4.5mm drill bit x1 5mm drill bit x1 5.5mm drill bit x1 6mm drill bit x1 6.5mm drill bit x1 note: It is prohibited to use products to drill holes in glass, concrete, wall tiles, and ceramic tile materials