The TenPoint AccuDraw is one of the most popular add-on crossbow cranks on the market, and there are thousands of crossbows currently equipped with AccuDraw. Firenock is now offering a more advanced design with total quiet operation and lighter weight crossbow crank, AeroCrank AD. The top feature is that one can decock the crossbow with the built-in clutch system. AeroCrank AD can be installed on many other crossbows that can fit the TenPoint AcuDraw, and Accudraw II crank as an upgrade. (Please contact us for details if you are not sure). FYI, optional parts, Picatinny Rail Mount, TenPoint Plate Mount, Quick Release Handle Mount, are available. US Patent 10,421,637.