The Berkley Ext. Arm System With Q.R. Lock is a convenient and flexible accessory for anglers who need extra length for their equipment. At 28cm long, this arm provides additional space to mount accessories on the Berkley Mount Base with Lock. Made of durable fiberglass-reinforced nylon material (20/80%) and equipped with high-quality stainless steel fasteners (304 grade), this arm ensures stability and reliability when used on the water. The Quick Release Lock adds ease of use by allowing quick attachment and removal, allowing anglers to quickly switch between different equipment.