Heavy-duty HandleThe metal handle made of zinc alloy material is heavy-duty, waterproof, for long life span use.Bi-folding HingesThe hinge made of zinc alloy with 2 axies can smoothly and safely fold two pieces of the tempered glass panels.180° Pivot SystemThe pre-sealed pivot structure made of aluminum can smoothly swing 180° inside and outside, and is easy to adjust the door open direction.