If you have a 400-series guitar made in the early- to mid-60s, you may have one that uses a shortened tailpiece.  If so, this the combo for you: a shortened tailpiece (to fit inside the narrower guard opening) with an integrated Tune-O-Matic bridge.  You can choose between the classic ABR-1, the newer Nashville bridge, or the 12-saddle.  The bridge saddles are unnotched with a 12" saddle radius.
 
Mounting screws are included.