Our investment cast stainless steel Mushroom Cleats are ideal for fresh water or salt water conditions. The cleats are made with a smooth tapered design that protrudes only slightly from the deck of your boat so as not to be an obstacle when boarding. They are spring loaded and are easily pulled up so that you can quickly attach a dock line. The cleats are 2" in diameter and require a 3/4" hole for mounting. NOTE: Eddie Motorsports Mushroom Cleats are intended for use with fender lines only. Not for use for mooring.