STANLEY Reversible 13mm Chuck with Key STA66321-QZ

KEYED CHUCK OPTIONS: can be used as a replacement or as an additional option
GENERAL PURPOSE: designed to be used with a drill with a forward and reverse function
CAPACITY UP TO: 13mm, perfect for most basic drilling tasks
CHUCK AND DRILL INTERFACE: 1/2" x 20 UNF
KIT INCLUDES: a chuck key to tighten chuck to drill bits
DIAMETER: 13mm
FITS: &D, AEG, Bosch, Elu, Fein, Hitachi, Kress, Makita, Metabo, Panasonic, Skill, Wolf.