The Kahler FLYER intonation bolt is the saddle intonation screw for the FLYER. It is used to adjust the saddle intonation. For the other CAM models (Pro Hybrid and X-Trem and all Bass tremolos), this is used as a CAM trem stop bolt when you're drop tuned or using a bass tremolo. This little bugger is the ticket because it locks the cam into a "dive only" mode allowing you to play in a "fixed bridge" or drop tuned mode. This is very easy to install. This CAM stop will work for any Kahler CAM system new or old that has a Phillips screw between the 3rd and 4th fine tuner. This uses a .050 Allen key to actuate.