Stable Design for Work - The carefully engineered hex bit holders reduce drill bit shake, providing improved stability and control for cleaner results across different working depths. Superior Durability & Hardened Steel - Crafted from premium high-hardness steel with wear- treatment, these 1/4 to 4mm bit adapters offer exceptional strength and lasting reliability for demanding professional use. Universal Fit for Standard Tools - Our 1/4 bit holder works seamlessly with both 1/4" (6.35mm) and 4mm bit systems, featuring hex socket design for broad compatibility with most drills and tool accessories. Powerful Performance & Complete Set - This 6-piece adapter kit (3x45mm, 2x25mm, 1x35mm) provides sufficient variety to meet different project needs with professional-grade accessories for versatile applications. Professional Quality for All Users - With multiple sizes and superior construction, these drill bit adapters deliver reliable performance perfect for both professionals and beginners in various applications., Weight: 0.11464037624 pounds, Manufacturer: HWIREUIGT