1.Marine Grade 316 Stainless Steel 2.Tube size 1-5/8, Length: 2, Shaft Diameter: 1/2 inch /12.8 mm. 3.The Clamp-On Oarlock fastens securely to the oar with one adjustable bolt with no drilling required. 4.The mounting plate rotates clockwise, which prevents the row lock from falling off, and the release line lock needs to rotate counterclockwise..

Smartmarine 8 inch Black Inspection Hatch & Detachable Cover Sleek new black colored finish Features a watertight O-Ring foam seal Low profile hatch, designed for installation on internal or external Flat surface Heavy duty, UV stabilised white ABS construction Reinforced round lid with non-skid surface Rubber seal ensures weatherproofing when moun..