I just bought this BN Aluminum backing plate to go under the deck of my aluminum boat.This plate matches the bolt holes of the Cannon downriggers ( manual ones). This plate gives the thin aluminum more strength when the downrigger is put on.It will bolt righ onto a downriggers mount or a swivel mount also. It will not fit under my deck so I am selling it. I paid $15 for it and will sell it for the same amount plus shipping.Can either PM me here or @
pkkaminski@roadrunner.com.