Greenfield Kwik Grip Self Locking Marine Cleat for 1/2" Line, 2pk:Self-locking marine cleat revolutionary patented designWorks with any rope up to 1/2"Made of durable corrosion resistant aircraft aluminum with a durable clear coat finishJust pull the rope to lockSpring loaded cam lock, self-locking design can use with one handReduces risk of horizontal releaseHigher load means tighter gripStainless mounting hardware This product ships in approximately 1 days