Durable MaterialThe drill chuck is made of high quality alloy, tight clamping, wear-resistant, surface plating, anti-rust and durable. Light weight and small size, no extra burden when using. Three Jaw DesignThe chuck uses triangular stability principle to provide superb stability by clamping the drill bit in three directions simultaneously, tightening it firmly and working safely. Universal Hexagonal HandleThe screwdriver chuck's universal 1/4 inch hex handle easily attaches to your electric screwdriver, transforming your screwdriver electric screwdriver into an easy-to-use and convenient drill or grinder for a quick change. Wide Range Of ApplicationsUse the screwdriver chuck to turn your electric screwdriver into a small drill or grinder, perfect for daily maintenance, woodworking drilling and sanding, DIY use and improving your working efficiency. Quantity and SizeYou will receive 2 drill chuck , a silver keyless chuck with a length of 72mm and a clamping range: 0.3-6.5mm and a black keyless chuck with a length of 49mm and a clamping range: 0.3-3.6mm, which can meet most of your working needs.