"Featuring best and fastest firing mechanism STAN Releases has ever engineered, the OnneX Thumb Bow Release offers bowhunters superior performance with a custom fit. This precision release design features a crisp breaking mechanism with zero trigger travel. Offering both independent trigger travel and trigger tension adjustments, the OnneX Thumb lets you adjust your trigger sensitivity from a hair trigger to extremely heavy. Featuring the versatile OnneX handle, this release comes with 3- and 4-finger attachments (with 30 of motion), 2 barrel posts, and 2 barrel sizes so you can set the release up exactly as you wish. Open hook design for consistent, accurate nock travel. Advanced design also features a Trainer Lock feature so you can practice trigger activation without actually firing. Loop retainer. Comes with 5/64"" Allen key. Advanced thumb button bow release for bowhunters Crisp breaking mechanism - zero trigger travel Independent trigger travel and trigger tension adjustments Comes with 3- and 4-finger attachments - 30 of motion 2 barrel posts and 2 barrel sizes - find your perfect fit Open hook design with loop retainer - consistent, accurate nock travel Trainer Lock - practice trigger activation without actually firing"