Efficient drill bit sharpening for extended tool life: This sharpener restores dull drill bits (3.512.5 mm) to like condition in minutes, delivering up to 30% faster drilling and up to 50% longer bit life. Ideal for reviving worn bits from metal, wood, or masonry projects, helping reduce replacement costs. Universal compatibility with 3.512.5 mm drill bits: Works with standard HSS, carbide, and titanium drill bits, including circular, tile, and masonry types. The adjustable guide covers 3.5 mm to 12.5 mm diameters, making it a versatile addition to professional workshops or DIY garages. Precision angle guide for professional results: Builtin 118 degrees angle guide ensures consistent sharpening angles, with a depth stop to prevent overgrinding. Delivers clean, burr edges on every bit for metalworking, woodworking, or tile installation. Tool installation on most angle grinders: Quick attach to 100 mm electric angle grinders with the universal clamp. No tools required; start sharpening in seconds, whether you are a professional contractor or a weekend DIYer. Use scenarios: Metal fabrication: revive dull HSS or carbide drill bits to maintain drilling speed through steel or aluminum. Woodworking and tile work: sharpen bits to achieve clean holes and reduce wandering in hardwoods or ceramic tile drilling. Home repairs and DIY projects: perform quick bit maintenance in the to extend tool life and save on replacements.