Strong, perforated, round magnets with included screws. 15mm diameter, 3.5mm thickness. 40-piece set.

N52 Super Strong Perforated Magnet Diameter: 15mm Thickness: 3.5mm Vertical Magnetic Force: 8kg Surface Plating: Nickel Package Contents: 40 Magnets, 40 Stainless Steel Screws Precautions: 1. This product is a sintered product made by compressing powder, so it is brittle and may break if dropped or struck. 2. Keep away from electronic devices such as computers and smartphones, IC cards, and credit cards. 3. Do not use if you have implanted medical electronic devices. 【Strong Magnet】One magnet can press 20 sheets of A4 paper onto a board; the vertical magnetic force is up to 8kg (material of object: steel). 【Rust-Resistant Finish】The surface is nickel-plated, giving it a shiny finish and excellent rust resistance. 【Compact and Easy to Use】Compact size, with a hole in the center, allowing it to be mounted on walls or wood with the included screws. 【Wide Range of Applications】Suitable for home use, office supplies, factory production sites, warehouses, educational activities, and more—the possibilities are endless. [Specifications and Warranty] Size: 15*3.5mm, Suction Force: 8kg. This product comes with a 30-day warranty from the date of purchase. If there are any non-human-caused defects within the warranty period, we will accept returns or provide free replacements according to the customer's wishes.