Bits for mining machines; Bits for power drills; Centering drilling bits being parts of machines; Chucks for power drills; Drill bits for rock drilling; Drilling machines and parts therefor; Electrical drills; Extensions for power drill bits; Milling cutters for milling machines; Polycrystalline diamond compact (PDC) drill bits for drilling machines; Power drill accessories, namely, non-electrical adapters for use in joining extensions and power drill bits; Power drill bit extensions; Power d...