The RatchetScrench™ ratcheting chainsaw wrench is the Rolls-Royce of chainsaw wrenches. Unlike common screnches, this tool has a reversible ratchet end, which really helps in tight spots, such as on chainsaws with full-wrap handlebars. Screnches are primarily used for adjusting chain tension, removing spark plugs, and accessing air filters, starters, and other components on certain saws. A scrench is a versatile little tool that does the job of two wrenches and a screwdriver. It is not restricted to chainsaws; it also works on small-engine string trimmers and leaf blowers. You can even use it to change 19mm automotive spark plugs. It is a worthwhile, versatile tool to carry wherever you go. The RatchetScrench™ tool is made of cold-forged chrome-vanadium steel.