Sharpening Stones to Hone Your Tools. Keep your tools sharp for better performance and safety. At Kingsbridge Supply, we carry a variety of sharpening stones that you can utilize to keep your tools honed and well-maintained. Sharp tools allow you to get the job done right in an efficient manner. Our sharpening stones come in a variety of shapes and sizes to satisfy your needs. We have flat and round sharpening stones made from aluminum oxide that can be used for your hand tools so your cuts are precise. Our India sharpening stone is coarse on one side and fine on the other to give you quality options to maintain your tools.