Nylon Body Compression HandleCompression handles reduce and eliminate noise and rattle from hatches when the boat is underway. The handle uses acompressed gasket to create a water-tight seal for compartments or hatches.Outer Diameter: 3"Cut-Out:2-1/2"Surface Depth: 1/8" - 3/4"Shaft Length: 1-9/16 - 1-3/4" Whitecap: Whitecap is a brand that produces a variety of marine hardware and accessories. Compression Handle: A compression handle is a type of latch mechanism used to secure doors, hatches, or other panels on a boat. It typically involves a lever or handle that, when operated, presses against a gasket or seal to create a tight and secure closure. Nylon Black/Black: "Nylon Black/Black" likely refers to the materials and color of the handle. The handle is made from nylon, a durable and corrosion-resistant synthetic material. The "Black/Black" color suggests that both the handle and the base are black in color. Non-locking: "Non-locking" indicates that this specific compression handle does not have a locking mechanism. It provides a secure closure but does not require a key or code to open.