Specially developed to make life safer for sea harbor pilots by providing removable anchor points for the ladder on the ship’s side. Designed to withstand aggressive marine environments, and powder-coating in safety yellow for high visibility. Resin encapsulation of magnetic elements makes the product seaworthy. They are lightweight at around 3 kgs, providing more than 800 kgs of clamping force even through many layers of paint and salt scale and grime on a ship’s hull. A derlin roller makes the hull magnet simple to attach and release. Class ABS certified. The holding magnet is sold in piece, and tightening belt and storing wooden box are separate order.