Blades for power tools; Core drilling bits; Drilling machines; Electric hand-held drills; Grinding tools for grinding machines; Grinding and polishing machines; Machine parts, namely, blades; Polishing system for use in single-head machines comprising grinding and polishing discs for stone profiling and edges; Power-operated angle grinders; Power-operated grinding wheels; Power-operated tools, namely, grinders; Power drill bit extensions; Power drills; Power saw blades; Saw machines