A blades cutting rim can easily become clogged and glazed-over. Dirty blades can cause tiles to rub, bounce, burn, or chip. Solid Gold resin dressing stones effectively remove glaze and debris from the blades cutting rim and expose clean, sharp diamond that is ready to cut again "like-new". Many dull or "dead" diamond blades may still have plenty of life left in them - ALWAYS TRY DRESSING YOUR CONDEMNED DIAMOND BLADES BEFORE TOSSING THEM AWAY!