Features 1、High-precision thread and tapered holes can be tightly attached to the tool. 2、The housing is treated with electrophoretic paint, making the product anti-rust even in worst environment. 3、By using specialized anti-thrust bearing to convert key-applied torque into superior gripping. 4、The clamping jaws are specially treated to improve wear resistance. 5、Enjoying super precision and durability. Specification Features: High-precision thread and tapered holes can be tightly attached to the tool. The housing is treated with electrophoretic paint, making the product anti-rust even in worst environment. By using specialized anti-thrust bearing to convert key-applied torque into superior gripping. The clamping jaws are specially treated to improve wear resistance. Enjoying super precision and durability. 3.0-16mm B16: 3.0-16mm denotes that clamp the drill between 3 and 16mm, and B16 represents the hole behind the chuck is about 16MM taper. Specification: Condition: 100% Brand New Material: Stainless steel Clamping range: 3.0-16mm / 0.12-0.63in Package list: 1 * Drill Chuck 1 * Key Package List