The “K” seat is made of all-aluminum material, retaining the unique cold and tough temperament of the material. The structure of traditional round-backed chairs is used, and sharp lines are used to create an aggressive vision and shape, which is different from the inherent gentle posture of wooden chairs. The bent metal plate is used as backrest and seat cushion, which makes the metal interact with people with exquisite seating angle and surrounding feeling. Indoor and outdoor can be placed at will, weather-resistant and rust-free. Surface fluorocarbon resin spraying, even if exposed to ultraviolet light, the color is still enduring.