Multipurpose Designed for heavy duty and underwater applications, suitable for lifting or recycling lost iron objects under water, such as water pumps, ferrous metal tools, broken heavy metal objects, antiquities. Simultaneous suspension, fixed applications and hobbies, optimal coating, Ni Cu Ni three-layer coating, permanent magnetic, long service life according to ISO 9001 quality system. Magnet structure and design Removable eyebolts: Unique threaded through hole design with eyebolts screwed into the side of the casing. Both eyebolts can be removed. note The magnet only attracts iron, ferrous metals and nickel, and does not attract gold, silver, copper, ali and its alloys and stainless steel. The magnetic force is concentrated on the bottom and the other side of the fishing magnet, and there is almost no magnetic force on any other surface. After a lot of use, the magnet casing will scratch and rust, but this will never degrade the performance of the magnet. To reduce this problem, the magnet should be rinsed dry before storage. The package includes: 1 x magnet 1 x ring 1 x rope random 1 x mask (random color) Product specifications MAX pull: 100KG / 200KG / 300KG / 500KG Diameter: 48mm / 60mm / 75mm Rope length: 20 meters (random color)