Check the listing for details. Custom Thumb Release Knob / Buttons. Condition: New with tags. Listed at 30.00 USD. These Thumb Release Knobs/Buttons are machined out of high quality aluminum. The 6-32 threaded hole is offset from center for more adjustment to find that sweet spot. These are a great way to increase accuracy while giving your release a personal touch. These use a bolt to attach to your release, the hole for the bolt to go thru should be approximately 1/8" or .125". You will receive 1 Button/Knob with your choice of size 1/2", 5/8", or 3/4". Our products are American Made! Also check out our other listings to see if we make an aluminum one guaranteed for your release! What's Included: (1) Thumb release Knob/Button of your choice(1) 6-32 x 3/8" Stainless Bolt If you have any questions feel free to ask as we aim to please!Thanks from the team at Outdoor Assassin!