Chuck keyed type 13mm X1/2-20UNF

Keyed drill chuck designed for secure bit retention in power drills and rotary tools. Features three hardened jaws that grip drill bit shanks firmly when tightened with the included key. Insert the key into the chuck slot and rotate to expand or contract jaws for reliable clamping across wood, steel, plastics, and masonry applications. Ideal for construction, industrial work, and DIY projects requiring precision drilling and bit stability. The 13mm capacity with 1/2-20UNF thread accommodates standard drill bit sizes and fits most compatible power tools.