Neodymium Magnet with Rubber Coating: These rubber-coated magnetic cups are made of 6 super-strong neodymium magnets and a steel backing plate encased in rubber. They feature a special multi-pole magnetic arrangement, significantly enhancing the adhesive force. The rubber coating protects delicate ferrous surfaces from scratches. Secure Mounting: Attach to ferrous surfaces on vehicles, metal shelves, and various types of machinery. The magnetic cup creates a permanent or temporary fixing point, avoiding the need for drilling. Note: 1) The 42kg magnetic pull force was tested using a computer-controlled tensile testing machine. This is the vertical pull force required to detach the magnet from a 10mm thick steel plate under ideal conditions. The actual pull force varies depending on: a: Steel thickness (thinner steel reduces pull force). The 42kg vertical magnetic pull force was obtained using a 10mm thick steel plate. b: Pull direction (the greater the deviation from 90 degrees, the lower the pull force; horizontal pull force is typically about one-third of the vertical pull force). c: Pull position (further from the center of gravity reduces pull force). Iron filings on the magnet surface also reduce pull force. 2) The magnet only attracts iron, ferrous metals, and nickel; it does not attract gold, silver, copper, aluminum, their alloys, or stainless steel. 3) Magnetic force is concentrated at the bottom of the magnet; there is minimal magnetic force on other surfaces. Color: Black 1. Part Name: D88mm Rubber Coated Magnet with M8 External Thread 2. Material: Neodymium Magnet + Steel + Rubber 3. Size: D88mm (Diameter) * 8mm (Magnetic Base Thickness) 4. External Thread: M8, 25mm length, 15mm length available 5. Vertical Pull Force: 42kg; Horizontal Pull Force: 8.4kg (based on 10mm steel plate) 6. Max. Operating Temperature: 80 degrees Celsius Product Features: 1. Strong pull force thanks to high-quality N45 neodymium magnet and steel plate. 2. Rubber coating prevents scratches on paint or other sensitive ferrous surfaces. Numerous Applications: Work and signal lights, cameras, fixtures, and more. Warnings: 1. This magnet is very powerful for its size and can pinch severely. 2. Keep away from children of all ages. 3. Do not allow magnets to collide with each other or a metal surface; exercise extreme caution when handling. Package Contents: 2 x Magnetic Base Mount (Lights not included) Note: Light and different displays may cause the color of the item in the picture to appear slightly different from the real thing. The measurement allowed error is +/- 1-3cm.