We have been in the aviation business since the mid-1970's. Our history of manufacturing aircraft sheet metal parts and assemblies along with engine STC's gives us first hand experience with all tools. No other airplane tool kit provider can claim this experience. We have a 210 horsepower STC for the Cessna R172K with a Continental IO-360 engine. Our Piper Cherokee product line includes window additions, wingtips, landing lights, dorsal fins, and structural wing and stabilator extensions on PA-28, PA-28R and PA-32 airplanes. Our Piper products may also be purchased at Knots 2U.