2 Jianlang Jinlong (Guangdong famous trademark, specializing in the research, design, manufacture and sales of building hardware products, Guangdong Jianlang Hardware Products Co., Ltd.)
3GMT (a joint venture between Stanley Black & Decker and Shanghai famous trademark GMT, a large domestic enterprise producing floor springs, Stanley East Rail (Shanghai) Hardware Co., Ltd.)
4 Dongtai DTC (Guangdong famous trademark, high-tech enterprise, Guangdong famous brand, high-quality home hardware accessories supplier leading the market with excellent technology, Guangdong Dongtai Hardware Group)
5Roto Noto (Germany 1935, the world's first set of flat hanging hardware, a larger manufacturer of door and window hardware systems, Noto Franck Building Hardware (Beijing) Co., Ltd.)
6. Huitailong (Guangdong Famous Trademark, Guangzhou Famous Trademark, National Excellent Enterprise in Building Decoration Materials Industry, Industry Influential Brand, Huitailong Decoration Materials Co., Ltd.)
Personally, I think the top-mounted aluminum alloy door and window hardware fittings are good, stainless steel material, moisture-proof, anti-corrosion, very durable and easy to install.