264lb Heavy Load Capacity & 150,000 Cycle Durability Test --Constructed with 2mm thickened Q235 cold-rolled steel plates and industrial-grade ball bearings, these CXHIIA drawer slides support up to 264lb weight capacity for heavy-duty applications. Rigorously tested to withstand over 150,000 open-close cycles under full load without deformation. The included wear-resistant ABS rubber pads provide superior impact resistance during operation. Secure Lock-in/Lock-out Mechanism with Full Extension Access --Features blue trigger handles that automatically lock slides when fully closed or extended (450mm closed/900mm extended length), preventing accidental sliding during transit. The 3-fold full extension design provides complete drawer access while industrial steel ball bearings ensure smooth, quiet operation even under maximum load. Double-Layer Corrosion Protection & 30+ Year Lifespan --Electro-galvanized blue zinc coating provides 2x standard anti-rust protection by sealing surfaces from moisture and oxidation.