Wolff  Gunsmith Kits, Blitzpaks and general purpose spring paks are generally intended for repairs where direct replacement springs are not available.  A wide range of types and designs are available to solve many needs.  These springs are produced with the same high quality material used in all Wolff springs and are intended to be custom fitted to a particular need.  Because fitting of these springs is required, fitting and installation by a qualified Gunsmith is recommended.