The Whitecap Compression Handle is designed to reduce and eliminate noise and rattle from hatches while the boat is underway. The handle uses a compressed gasket to create a watertight seal for compartments or hatches. Outer Diameter: 3"Cutout: 2-1/2"Surface Depth: 1/8"-3/4"Shaft Length: 1-9/16" - 1-3/4"Material: Nylon / Stainless SteelStyle: Locking Made of black nylon & stainless steel | Whitecap 3" Locking T-Style Compression Handle, Black Nylon/Stainless Steel