Product features: Super strong-There are 5 different sizes and sizes. The diameter of this fishing magnet is 20/25/32/36/42mm, and the base uses a powerful neodymium magnet. Under ideal conditions, it can provide a pulling force of 9 /19 /32 /41 /61 kg. High quality-The strong magnetic force is only concentrated on the bottom, and the other three sides are protected by steel cups with almost no magnetic force. The magnetic force is equivalent to 10 times the volume of the same magnet. Constant force and long service life. Manufactured according to ISO 9001 quality system. The best coating-Ni Cu Ni three-layer coating. The best coating available, providing shiny and rust-resistant coating The steel cup provides protection for the magnet and helps prevent chipping or cracking. Multi-purpose-unique design with countersunk holes and eye bolts is very suitable for fishing all kinds of iron-nickel materials underwater. It is a good idea for magnet fishing, lifting, hanging, and recycling applications. Search for eye bolts, screws, hooks, fasteners and other items in your warehouse garage or yard and have fun. Permanent strength-Neodymium is a rare earth metal, suitable for making permanent strong magnets. This fishing magnet has permanent magnetism, and it will be as powerful even decades later. specification: 1. Shape: round 2. Material: NdFeB magnet A3 steel 304 stainless steel 3. Color: silver 4. Maximum vertical tension D16mm: 5KG D20mm: 9KGD25mm: 19KGD32mm: 32KGD36mm: 41KGD42mm: 61KG 5. Maximum working temperature: 80 Package Included: 1 x Fishing magnet