SEACHOICE 78011 Chrome-Plated Zinc Marine Cover Support Angled Bow Sockets, Set of 2 Angled sockets hold bows to create arch support for boat cover Durable chrome plated zinc construction Overall size: 3-1/4 inch x 5/8 inch Opening dimensions: 1-7/8 inch x 7/16 inch Accommodates 3/8 inch battens up to 1-3/4 inch