Carter Enterprises Introduces two new thumb triggers for 2011, the Plain 1 and the Simple 1. Both releases feature a quick and simple one step self closing jaw that automatically closes and locks the jaw when the release is cocked. Both the Plain 1 and the Simple 1 feature a shorter head to give you added draw length. The Simple 1 comes in three finger and the Plain 1 comes in four finger. When looking for a no frills plain and simple release, there is no reason to skimp on quality.