Get a patent. If it is a salable tool then you have to have the tool made and packaged. Then you go vend and demo at all the quilt markets to get a distributor to wholesale your tool to quilt shops. You go to all the quilt shows to vend to quilters. One of the newest products out there for quilters and designed and marketed by an individual is Pinmoors.
http://www.pinmoor.com/ I would contact her and see is she would give you some start up advice or who to contact first. Watch the reruns of Shark Tank!