Heavy duty cast construction:Thickness:4.8mm(0.189inches). It last long even if the hinges withstand heavier doors and larger hatches. Specifications of T hinges:length:3.94inches(100mm), width:2.12inches(54mm). Thickness:4.8mm(0.189 inches).Screws:M5x20mm. Marine grade 316 stainless steel:316 stainless steel provides excellent resistance and has a polished . it can withstand harsh Marine environments and is not easy to rust. Smooth opening and closing:The large knuckle and solid pin increase strength and provide smooth operation. These hinges operate with sliding bearings, which open and close smoothly without noise. Wide application:These hinges are perfect for exterior applications and can be inserted into doors and hatches. Applicable to boat/ family/marine/yacht or , lockers, cabinets, decks, , toolboxes, etc., Weight: 0.45084532579 Pounds, Manufacturer: Taviko