Llambrich CL Portable Machine Light Duty KG Keyed Drill Chuck, 3/8" x 24 UNF Mount, 1-11/64" Chuck Diameter, 1/64"-1/4" Capacity Light-duty drill chuck with key for portable drilling machines Ideal for electric portable drilling machines With or without batteries, cutting direction reversible or non reversible Fits tools of up to 16 mm Fits to machine via UNF screw fittings, male and female, DIN-228 and E-6.3