The UltraViews Funky Helix Knob is compatible with all thumb button style releases such as TRU Ball Abyss GOAT, Carter releases, Scott, B3 and TruFire. The angle of the knurling is perpendicular to the thumbs movement during a shot to add an extra grip feel. This knob features a ½ x ½ dished square that has been twisted to fit onto a thumb and comes with ½ long 6-32 & 5-40 socket screws and nuts for installation.
