The Helix Knob™ has been a fan favorite since 2017. At first glance the knob looks a little atypical but it works great! The peak of the ridge fits perfectly into the valley of your thumb knuckle crease and provides you with extremely consistent thumb placement resulting in rock solid shot execution.   Helix Knob™ is Cerakoted for maximum durability and longevity. Works with UV Button™ or most other thumb button releases.