In an era of endless digital notifications, touchscreens, and plastic desk clutter, there is something deeply satisfying about interacting with precision-engineered metal.

UK-based design house MetMo has earned a cult following among design enthusiasts for turning complex mechanical and scientific principles into tactile works of desk art.

Their latest creation, the MetMo Eddy Desk Toy, brings the mesmerising magic of electromagnetism directly into the palm of your hand.

Priced at £69, this pocket-sized cylinder harnesses the power of Lenz’s Law to slow down time, transforming a simple magnetic drop into a silent, slow-motion physics demonstration.

* Material Build: Ultra-High Purity, Lead-Free Copper Billet
* Magnet Engine: N52 Nickel-Coated Neodymium Sphere
* Chassis Dimensions: 75.8mm (2.98") Length × 20mm (0.79") Diameter
* Total Weight: 110.7g (3 oz) Heavyweight Feel
* Surface Finish: Passivated Brushed Copper w/ Knurled End Caps
* Origin & Craft: Designed, Engineered & Hand-Finished in the UK

Lenz’s Law in the Palm of Your Hand

At first glance, the MetMo Eddy appears to be a solid, beautifully finished copper capsule. But drop the included N52 neodymium magnetic ball through its precision-bored centre, and gravity seems to lose its grip.

As the powerful rare-earth magnet travels down the tube, it induces invisible swirling loops of electrical current within the copper wall—known as eddy currents.

In accordance with Lenz’s Law, these induced currents create an opposing magnetic field that acts as a natural electromagnetic brake. Rather than plunging straight through, the magnetic sphere floats downwards in surreal, silent slow-motion, behaving as if it were sinking through invisible treacle.

It is a captivating visual effect that never fails to intrigue anyone passing by your workstation.

Precision Machining & British Engineering

Created in MetMo’s UK workshop and CNC-machined from a solid billet of ultra-high purity, lead-free copper, the Eddy boasts extraordinarily tight engineering tolerances.

The internal bore brings the copper wall into near-contact with the magnetic sphere without ever touching it, maximising the efficiency of the eddy currents for the smoothest possible deceleration.

“By pairing ultra-high purity copper with an N52 neodymium magnet, MetMo turns fundamental electromagnetism into an addictive, silent desk instrument.”

Weighing in at a satisfying 110.7 grams, the cylinder is contoured for intuitive one-handed flick-and-drop rotation. The exterior showcases a brushed main body contrasted by tactile knurled end caps that are a joy to handle.

Furthermore, the copper undergoes a specialised passivation treatment that adds a protective surface layer, preserving its “just machined” lustre and preventing unwanted oxidation without requiring constant polishing.

Silent Tactile Fidgeting & Infinite Coupling

Designed for pure, unadulterated fiddling, the MetMo Eddy operates in complete silence.

Unlike clicky pens or mechanical switches that annoy colleagues in quiet office environments, the Eddy delivers completely soundless motion—making it an ideal focus tool during long phone calls or creative brainstorming sessions.

Specification	Technical & Architectural Detail
Retail Price	£69 GBP
Core Physics	Induced Magnetic Fields / Eddy Current Braking
Magnet Type	High-Grade N52 Crystalline Alloy Neodymium Sphere
Surface Finish	Passivated Brushed Body w/ Knurled Grip Caps
Modularity	Removable Caps & Eddy Coupling System

For those who like to experiment, both end caps can be unscrewed to let the ball drop completely through the open tube.

Better yet, MetMo designed an “Eddy Coupling” system that allows you to link multiple units together end-to-end, creating an extended tower for longer drop distances.