Adjust the length of the pole with just the touch of the thumb. The green quick-release position lock is made of durable, fiberglass-reinforced nylon with a heavy-duty brass locking pin. It has a polyester fabric surface treatment for durability. The strong hexagonal inner pole, made of anodized aluminum, prevents twisting and locks in 6 in. increments. The rugged, zinc die-cast threaded tip holds the roller frame securely.