Specialized trigger mechanisms made from enhanced and hardened 440C stainless steel -All handle sizes and release points remaining the same no matter the firing mechanism i.e., Thumb, Resistance, or Hinge -Fully adjustable trigger tension and travel -The thumb and Resistance models have the incorporated Spring-loaded string keeper for a fast hook up to the D-loop -Adjustable thumb knobs, thumb post extensions, and finger pieces -The OnneX is available in Small, Medium, Large, X-Large and XX-Large