- Efficient Drill Bit Sharpening for Extended Tool Life: This sharpener restores dull drill bits (3.5–12.5 mm) to like-new condition in minutes, increasing drilling speed by 30% and extending bit lifespan by 50%. Ideal for reviving worn bits from metal, wood, or masonry projects, helping reduce replacements. - Universal Compatibility with 3.5–12.5 mm Drill Bits: Compatible with standard HSS, carbide, and titanium drill bits, including circular, tile, and masonry types. The adjustable guide fits small (3.5 mm) and large (12.5 mm) diameters, making it a versatile addition to professional workshops or DIY garages. - Precision Angle Guide for Professional Results: Built-in 118° angle guide ensures consistent, factory-like sharpening angles, while the depth stop prevents over-grinding. Delivers clean, burr-free edges on every bit, suitable for precise metalworking, woodworking, or tile installation projects. - Tool-Free Installation on Most Angle Grinders: Quick to attach to 100 mm electric angle grinders with the universal clamp—no tools required. The intuitive design lets you start sharpening in seconds, whether you are a professional contractor or a weekend DIYer.