Pre-installed grooves are a type of prefabricated building component, where a C-shaped groove is first embedded in concrete, followed by inserting the large end of a T-bolt into the groove. The components to be installed are then secured with the T-bolt. The quality characteristics of pre-installed groove steel include: high load-bearing capacity, up to 32kN or 128kN/m; small edge distance, as small as 5cm; easy adjustment; noiseless and dust-free during installation; officially certified for both static and dynamic load-bearing; excellent corrosion resistance, made from stainless steel or hot-dipped galvanized steel. These comprehensive quality features make pre-installed groove steel an indispensable product for all designers and users.