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A door closer is a vital hardware component that ensures doors close automatically, securely, and smoothly—boosting safety, energy efficiency, and convenience in residential, commercial, and public spaces. Selecting the correct door closer is critical: an ill-fitted model may cause slamming, prematu

OverviewJianlai Floor Spring is a professional-grade floor spring manufacturer specializing in heavy-duty door hardware for commercial and residential glass door applications. The JL-7135, JL-7145, and JL-7300 models share a unified square spindle design, making them fully compatible with standard p

OverviewAs a core hydraulic door hardware fitting widely used in modern architectural entrance systems, theJianlai JL-84 Floor Spring is a globally universal heavy-duty floor hinge designed for high-frequency commercial door scenarios. Built with high-precision hydraulic transmission technology and

Elevate Your Space with Smart, Secure, and Seamless AccessAt Jianlai, we believe that the way a door opens defines the experience of every person who walks through it. Our Automatic Sensor Door System combines heavy-duty modern double-open construction with cutting-edge access technology — deliverin