You can quickly attach to different hex end power tools with the drill chuck extension tool and they also offer excellent performance at high rotation speeds.With high-precision and reverse threads, both the chuck adapter and extension rods are designed to provide secure clamping and prolonged lifetime.Made of premium carbon steel, the drill chuck adapter is strong and durable.The thread diameter is 1.4cm, the adapter length is 4.5cm, the shank diameter is 0.6cm. 1 or 4" hex shank to M14 thread adapter for drill chuck.It is suitable for electric drill, electric hammer, impact driver and impact wrench, etc.Item Name: Drill Chuck AdapterMaterial: Carbon SteelShank Type : Hex ShankFeatures: Quick Connection, Long Lasting, High CompatibilitySize Details: Length: 4.5cm or 1.77" (Approx.)Thread Diameter: 1.4cm or 0.55" (Approx.)Shank Diameter: 0.6cm or 0.24" (Approx.)Size: 4.5cm x 2cm x 2cm or 1.77" x 0.79" x 0.79" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Drill Chuck Adapter