This Thumb Latch With Armor-Coat is a traditional Suffolk Latch suitable for internal and external use. The advanced anti-corrosion finish makes this latch especially suitable for exterior & garden doors. Classic penny end design. Co-ordinate with the matching T Hinges with Armor-Coat. Armor-Coat Advanced Hardware Finish is a unique finish, specifically developed to provide corrosion protection in all weathers. Independent testing has awarded this finish BS EN 1670:2007 Grade 5 - the highest anti-corrosion level for steel-based hardware in the industry. Compatible with Accoya wood, the world's leading high technology long-life wood. See our blog article Ironmongery for Accoya Wood Doors & Windows for more details. For measurements of the Thumb Latch With Armor-Coat, please see the PDF drawing in Dimensions. Material: Steel. Finish: Flat Black. Style: Thumb Latch with Armor-Coat. Suitable for exterior & interior use. Advanced anti-corrosion Armor-Coat finish. 5 year guarantee (see T's & C's for conditions)