COIL-SERT™ inserts are supplied in coarse and fine threads.  Type 2, Type 4 and Type 6 tooling are used for finer pitch inserts, which are larger in the free state than the coarse pitch insets.  They have to  be "pre-wound" to a smaller diameter for installation.  Type 1, Type 3 and Type 5 tooling (threaded mandrel) is used for coarse pitch inserts.