A fully adjustable thumb release with ultra-fast spring-assisted hook, consistent hook positioning, and trainer lock compatibility, available in two finishes. The Stan SX4 is a competition thumb release engineered for minimal release latency and repeatable execution. The ultra-fast spring-assisted hook reduces the time between decision and release to limit the impact of micro-movements, while the hook biases into the same position on every draw for consistent and reliable shot execution. Fully adjustable finger position, travel, and tension allow the release to be configured to individual preference, and custom T10 Torx hardware locks all adjustments securely without stripping. Compatible with a trainer lock and wrist strap. Available in black aluminium and heavy metal polished brass. Key Features Ultra-fast spring-assisted hook for reduced release latency – The spring-assisted hook mechanism minimises the time between the decision to release and actual string departure, reducing the window in which micro-movements can affect shot placement for a cleaner and more consistent execution. Consistent hook positioning for repeatable and reliable execution – The hook biases into the same location on every draw, ensuring a consistent and repeatable starting position for each shot and removing variability in hook placement from the execution process. Fully adjustable ergonomics with custom T10 Torx hardware – Finger position, travel, and tension are all independently adjustable to suit individual hand size and shooting preference. Custom T10 Torx hardware locks the thumb post, finger, travel, and tension settings securely without risk of stripping under repeated adjustment. Specifications Type: Thumb release Hardware: Custom T10 Torx Trainer Lock: Compatible Wrist Strap: Compatible Available Finishes: Black aluminium / Heavy metal polished brass