iron nickel plating material, durable to use. Straight loop catches toggle latches, with mounting holes. High strength catch and strike. Economical and compact size. Pull up ability, no secondary lock. Spring loaded with excellent tension, easy to install. Specification:Material: IronFinish: Nickel PlatingTotal Size (combination): 90 x 47 x 22mm / 3.54 x 1.85 x 0.87inch (L*W*H);Main Body Size: 73 x 47 x 22mm / 2.87 x 1.85 x 0.87inch (L*W*H);Arm Length: 61mm / 2.40inchHook Size: 37 x 26 x 13mm / 1.46 x 1.02 x 0.51inch (L*W*H);Hook Thickness: 1.8mm / 0.07inchHook Mount Hole Diameter: 5.2mm / 0.2inchBody Mount Hole Diameter: 5mm / 0.2inch Package Content: 1 x Spring Toggle Latch Notice for Choosing the Stainless Steel Type? The stainless steel is not entirely rustless. It is just rust-proof in the proper condition.* For the indoor decoration or furniture, stainless steel 201 or 304 (SUS201, SUS304) can be used. But Type 201 should only be kept in the dry condition.* For the not-so-good outdoor condition, in the extremely humid environment, or somewhere with salty vapor, such as by sea or swimming pool, Type 316 or 316L should apply.* To bear the big load, the carbon steel is a good choice. Its finish can be Zinc plating or paint coating, varying in the environment conditions.