The folks at Stan pulled out all the stops for in their design of the SX4 thumb release. It incorporates an adjustable 3rd and 4th finger, includes a durable and repeatable spring-assisted hook, features high-end torx hardware, and allows for ease of training and hunting with the lanyard and trainer locks. Product Features Ultra-Fast, Spring-Assisted Hook: Reduces latency from decision to release, limiting the impact of micro-movements. Consistent Hook Positioning: Biases into the same location every time for repeatable, reliable execution. Custom T10 Torx Hardware: Locks thumb post, finger, travel, and tension without stripping. Fully Adjustable Ergonomics: Tunable finger position, travel, and tension for a personalized feel. Trainer Lock + Wrist Strap Loop: Built-in training capability and real-world usability features. Product Specifications Activation Style: Thumb button Type of Strap: Lanyard (not included) Model: 3 / 4-finger Construction: Aluminum Adjustable Tension: Yes Adjustable Travel: Yes Micro-Adjustable: Yes Color: Black