K3 drill chuck key 5/16 pilot size

Compact K3-pattern drill chuck key with 5/16 in pilot designed for keyed Jacobs-style chucks; features a durable soft-steel handle with nickel thumb grip for secure torque transfer and long service life; direct replacement for K3 keys on compatible Jacobs and LFA chucks; supplied as a single key for toolroom, maintenance, metalworking, and woodworking applications.