The Penn Fathom-Master Swivel-Matic Base increases the performance of your downrigger with 36 positions and 360 degree rotation. This base easily attaches to the base of your Penn Fathom-Master Downrigger on the transom or gunwhale. The Swivel-Matic Base adds versatility to your Penn downrigger.

This Penn Fathom-Master Swivel-Matic Base is Penn model 622ASM.

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