Description: 100% brand new and high quality. Eliminates the need to change collets when between bit sizes. Twist-to-tighten/loosen with a tightly knurled grip means no wrench or wrench needed. Heat treatment and hardened high carbon steel ensure durability; Rust-resistant black oxide. Corded rotary tools without changing collets. Specifications:Yield: 0.3 to 3.2mm Long Length: 24mm Short Length: 18mm Diameter: 1.4cm Color: BlackPackage Included:1x Drill ChuckNotes:-Due to the difference between different monitors, the picture may not reflect the actual color of the product.-Please leave a message before you give bad feedback if the products have some problems.-Please allow 1-3mm error due to manual measurement.-Thank you for your understanding.