Check the listing for details. Tru-fire Synapse Custom Thumb Button. Condition: New with tags. Listed at 16.00 USD. Outdoor Assassin is proud to offer another AMERICAN made product!These 3/4" round x 1" long Tru-fire Synapse Custom Thumb Buttons are 3D printed. You will receive 1 Button/Knob with your choice of Color and Knurl pattern. Colors include: Black, Orange, Red, and Flo-green. Knurl Patterns include: Diamond Knurl and Spiral Knurl. Please refer to pictures for colors and knurl patterns. Release in Picture (Tru-fire Synapse shown) is example of what your release could look like and is not included. Our products are American Made! This Product is only guaranteed to fit the TRU-FIRE SYNAPSE Whats Included: (1) Thumb release Knob/Button of your choice(1) 6-32 x 3/8" Stainless Bolt installed (to tighten down) If you have any questions feel free to ask!