USAGE: These drill chuck screwdriver adapters can easily turn an electric screwdriver into a drill or a grinder, and can be quickly switched during work to save time and improve work efficiencyUNIVERSAL HEX : The drill adapter's universal hexagon handle can be easily inserted into an electric screwdriver, which is easy to use and quick to switchMATERIAL: The drill conversion chuck set is made of steel, rust-proof, wear-resistant and durable, and has a long service lifeWIDE RANGE OF APPLICATION: These drill chucks have various specifications and can be used for most drill bits and electric screwdrivers; they can be used in cars, garages, warehouses, offices, houses, etcColour:Black+silverMaterial:steelPackage Contents:1 * Hex handle 0.3-3.6mm black chuck1 * Hex handle 0.3-6.5mm silver chuck1 * Hex handle 0.3-6.5mm black chuck1 * Hex handle 0.6-8mm black chuckOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.