Mutuactor Fishing Magnets 300kg Strong Pull Force, Powerful Retrieval Neodymium Magnet N52 with10m (32feet) Durable Rope,Magnet Fishing for Underwater Metal and Treasure Salvage Magnet in Water

Mainly Made up of N52 neodymium magnet and a steel shell, it can concentrate the magnetic field on thebottomof magnet which increase the magnetic force by 2.5-4 times compared to the naked magnet . The steel cup can prevent the naked magnet from Crackings and chippings. It is designed for heavy duty and underwater useand helps to recover lost equipment, tools, fishing tackles and other ferrous objects in deep water, wells, holes. It is also great for magnet lifting, hanging applications. Specification 1. Material: Neodymium Magnet N52+A3 Steel 2. Size: D80mm 3. Vertical Pull-force:300kg Horizontal Pull-force: 75kg On Base of 30mm Thick Steel Plate 4. Max Working Temperature:80℃5. Package Included:One fishing magnet+ D7.5MM(0.295inch)*10m Nylon Rope +Eye-Bolt+Carabiner Note: 1 magnetic force 300kg is the vertical pull-force which make the magnet pull way from the thick 30mm steel plate of a tensile tester under ideal condition. The actual pull force will vary mainly depending on the following variables: A: Steel thickness (The thicker the steel is, the stronger the pull force) B: Pulling direction (The smaller the angle taking 90° as a standard, the stronger the pull force), the Pull force in horizontal direction is only about one thirds of that in vertical direction) C: Attracting position (The farther beyond the center of gravity of the attracted object, the lower the pull force) 2. Magnet just only attract iron, ferrous metal and nickel, do not attract gold, silver, copper, Ali and their alloy and stainless steel 3. Magnetic force concentrates on the bottom of the fishing magnet,there is hardly any magnetic force of other surface