Fasnap Brand Stainless Steel Buttons Sockets, Marine Grade Top Quality 40 of Each Piece - Sufficient to Complete 40 Caps Sockets of the Snap Assembly Cap Post is 3/16" Line 24 When purchasing snaps be sure to look for the Fasnap Brand or DOT Brand name stamped into the socket. This will assure you are purchasing a quality product. Anything else may corrode, pull apart easily or break. Top Quality Stainless Steel Snap Fasteners, Marine Grade, Recommended for Salt Water Environments Heavy-duty construction assures a firm grip that will remain secure through years of use All Stainless Parts, superior snap action and holding strength We Ship Internationally! Northwest Tarp Canvas Bellingham, Washington Take a Look Our Quality Tarps! Have a Nice Day!