4mm x 4mm x 2mm (5/32" x 5/32" x 5/64") Neodymium Square Block – N52 Grade 

Key Features:

• Dimensions: 4mm Length × 4mm Width × 2mm Thickness
• Precision Tolerance: ±0.05mm 
• Magnet Grade: N52
• Pull Force: Approx. 1.15 lbs (0.52 kg) 
• Coating: Nickel-Copper-Nickel (Ni-Cu-Ni) triple-layer plating 
• Magnetization: Axially magnetized through the 2mm thickness (Poles on the flat square faces)
• Shape: Square Micro-Block

Material Description:

Our 4x4x2mm N52 blocks are designed for professional engineering and intricate hobbyist projects. The square footprint provides a stable, non-rolling base, which is critical when mounting into small 3D-printed parts or CNC-machined recesses. At 2mm thick, this magnet provides a deeper magnetic field than ultra-thin alternatives, ensuring a reliable trigger for sensors or a secure "click" for miniature latches.

Handling Advice: NOTICE: These magnets are exceptionally small and brittle. Due to their sharp corners and N52 strength, they can chip if allowed to snap together with force. Always separate them by sliding the top magnet off the stack horizontally and use non-magnetic tweezers for precise installation.

Warnings and Safety Information:

• Choking Hazard: Small size is dangerous for children and pets. Keep strictly in a secure container.
• Ingestion Warning: Swallowing multiple magnets can cause serious internal injury. Seek immediate medical help if ingested.
• Medical Safety: KEEP AWAY from pacemakers and sensitive medical implants.
• Electronics: Safe for modern devices at a distance, but avoid direct contact with magnetic storage media.

Applications:

• Precision sensor triggers for micro-electronics and wearables
• Hidden latches for micro-jewelry boxes and dollhouse furniture
• Articulation for 28mm and 32mm gaming miniatures (ideal for limb swaps)
• Custom reed switch activation in confined industrial spaces
• Modular "tiling" for small-scale magnetic tool and bit organization