Accurate, burr-free holes|Precision ground carbide teeth for fast cutting of clean, round holes|Over drill stopper prevents the tool from penetrating beyond the hole|Starts on contact|Split point pilot bit for faster penetration and less walking|For cutting sheet metal, stainless steel, steel, copper, brass, aluminum, PVC and fiberglass|Long life tool heat resistant carbide teeth for long life in sheet metal and stainless steel