Five Oceans Skene Bow Chocks (Set of 2) FO-358 Dimensions: 4 3/4  (120 mm) L x 13/16  (52 mm) W x 1 (26 mm) H Mounting Dimensions: 3 1/4 (83mm) Chock Spacing: 9/16 (15mm) Mounting Hardware: Four #8 Fasteners (not included) Material: 316 Stainless steel