Stainless steel, available in brushed and mirror finishes, square column shape, approx. 40-50mm side length, square hole inside for inserting square tube, side fixing screws for locking; bottom can connect to posts or bases. Mainly used for connecting and fixing square handrail tubes to posts in modern style stair handrails, glass railings, landscape guardrails, etc., square design has sharp and neat lines, more modern minimalist and industrial style, convenient and stable installation, perfectly matches square tubes, a common connecting accessory for modern railing systems.