STANDARD POWER: Springer Precision XD/XDm Striker Spring standard power. This is for those who want a stock replacement.
PLUS POWER: Springer Precision XD/XDm Striker Spring plus power. This is for those who are using hard primers and need some extra hitting power.
REDUCED POWER: Striker Spring - reduced power. This is a striker spring for people who want to experiment with dropping their trigger pull. NOT FOR USE in carry or duty guns and NOT FOR USE with hard primers such as Winchester or CCI. Best used with Federal primers.