Discraft manufactures and distributes discs used for the sports of disc golf, ultimate, and catch. The company was founded in 1983 by Jim Kenner who experimented with new designs to create a better disc golf experience. Today Discraft stands as a top disc golf manufacturer. Discraft flight numbers use an additional stability rating that is unique to Discraft, it is basically a “turn” rating of stability — overstable (+3,+2,+1), stable (0), understable (-1,-2,-3). They also add in decimal points to their stability ratings which is a little different from the other manufacturers.