A spring in the release returns the string catch to the cocked (latched by the trigger) position after firing.  In order to pull the trigger the safety button must be pressed.  When using the Lock-a-Draw the release is held between the thumb and fore finger while aiming, the safety button being held down by the thumb (right hand bow) or the index finger (left hand bow).  The trigger is pulled with the middle finger.  The Lock-a-Draw is always cocked and the safety is always on except when aiming and firing.