Chucks for power drills; Drill chucks for power drills; Power drills; Electrical drills; Drilling machines; Pneumatic hand-held drills; Electric hand-held drills; Power tools, namely, hammer drills; Drilling machines and parts therefor; Cordless electric hand drills; Air drills; Power-operated tools, namely, drill hammers; Extensions for power drill bits; Power drill bits; Drill sharpening machines