Locking clamps are designed to clamp perfectly ball joints with a diameter of 2.5 cm (like Carbonarm ball joints). They are made from 40-micron anodized anticorodal aluminum (military standard) to ensure maximum durability and excellent resistance to wear and seawater. The two aluminum parts are joined by a stainless steel nut. A stainless steel spring is placed inside to facilitate opening the clamp when it needs to be loosened. There's also a washer and wing nut inside for easy tightening. This system ensures a perfect fit and tightening of the ball joints on the arms.