Adopts PE-coated metal tubes, would not hurt plants, sturdy and durable. In contrast to thin wire rings that only work for small plants, our thick supporting rings hold up heavy tomato plants. Each trellis offers 3 height options, accommodate the growing height of various climbing plants. The upgraded hook interfaces tighten the connection between supporting rings. The bottom sharp caps allow for easy insertion into the soil for stability. The 56" tall tomato plant support trellis could help improve air circulation and promote healthy growth. The bud-shaped top stakes add a touch of elegance to the trellises. Enhance your flowerbeds, create a vertical garden, or grow delicious fruits and vegetables.