Description 1. Pagoda-Shaped Step Hex Design: This unique bit features a stepped hex head that cleverly combines three common sizes (4-5-6mm, 2.5-3mm, or 1.5-2mm) into a single tool. It eliminates the need for frequent bit changes during multi-stage projects, significantly improving your working efficiency. This versatile design allows you to handle various hexagonal screw sizes effortlessly with just one bit. 2. Premium S2 Alloy Steel: Constructed from industrial-grade S2 alloy steel, these screwdriver bits are engineered for maximum performance and longevity. They undergo a high-temperature quenching process, achieving a hardness of up to HRC60+. This ensures exceptional resistance to wear and stripping, making them perfect for heavy-duty use in professional and DIY applications. 3. Precise Fit & Non-Slip: The hexagonal tip is precisely forged and machined to ensure a tight, secure fit with internal hex screws. This close engagement prevents slipping and stripping, ensuring stable operation and making both assembly and disassembly more convenient. The strong magnetic tip securely holds screws in place, preventing them from dropping and getting lost. 4. Universal Compatibility: Featuring a standard 6.35mm (1/4 inch) hex shank, these bits are designed to fit a wide variety of power and hand tools. They can be applied to charging electric drills, electric hand drills, electric screwdrivers, and pneumatic screwdrivers, etc. Therefore, they are indispensable essentials in any toolbox. 5. Specifications: This set includes a total of 6 hexagonal screwdriver bits made of high-strength S2 alloy steel. It features three bits with a total length of 65mm (approximately 2.56 inches) and three bits with a length of 100mm (approximately 3.94 inches). The bits cover three different stepped hex size ranges (4-5-6mm, 2.5-3mm, 1.5-2mm), all with a standard 6.35mm (1/4") hex shank. Package list 3 x 65mm Pagoda-Shaped Hex Bits (sizes: 4-5-6mm, 2.5-3mm, 1.5-2mm) + 3 x 100mm Pagoda-Shaped Hex Bits (sizes: 4-5-6mm, 2.5-3mm, 1.5-2mm)