Hatch Adjuster - 11" Constructed of corrosion resistant formed 304 stainless steel with UV resistant injection molded nylon mounting pads and knob. These Hatch Adjusters feature a simple thumb screw knob to lock into position. Great for dock box lids, hatches, windshields, etc.WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.