Universal Deck mount base only. 316 SS construction. Works with Schaefer 70-77 8.5" cleat, 78-76 Stainless Screw eye, 08-77 SS 8 series block, M66-07 Screw in block or M82-07 Screw in block. All accessories sold separately. Base is 3-5/16" (100mm) x 3-1/8" (79mm). Hole diameter in deck 1-3/4" (44mm), hole depth in deck 1-3/32" (33mm). Includes SS backing plate.