3 inch x 3 inch steel backer plate with 10-24 threaded holes.

Includes:
(QTY. 1), 3 inch x 3 inch steel backer plate with 8 x 10-24 tapped holes, AMPS and 2 inch 2.5 inch hole patterns
(QTY. 4), 10-24 x 1 inch pan head, phillips drive screws with thread locker applied
(QTY. 4), 10-24 black zinc plated nylock nuts

Material:
Powder Coated Marine Grade Aluminum