Mirror finish 304 stainless steel, two tube bodies connected by swivel joint with side locking screws, adjustable angle from 0 to 90 degrees freely. Fits splicing of special-shaped and curved railing handrails, compensates size errors of civil construction, flexibly adapts to tubes with different inclination angles without customized elbows to reduce stocking cost, matched with balconies, landscape guardrails and stair handrails.