Product: DRILL CHUCK KEY Material: Steel Type: Key (for tightening/loosing chuck jaws) Use: Operates drill chucksAvailable Sizes & Packaging (Per Carton):Size (Metric)Size (Imperial)VariantUnits Per Carton13mm1/2″Standard500Key Notes:“Big Size” likely refers to keys designed for heavy-duty chucks or with larger handles for increased torque.Quantities per carton decrease significantly for larger sizes due to their increased physical size/weight.
