This release is made to attach to the bracket of the OR12 Side Planer and OR37 SST Pro Mag Planer.With the wide range of tension settings this release is ideal for Walleye, Salmon, Steelhead, Trout, and Muskie. For use with super lines, lead core as well as monofilament. This release comes as standard equipment on the OR37 SST Pro Mag Planer.