This pen knife (or perhaps flick knife) does actually open and just like all our other cufflinks, these are rhodium-plated.

For those with safety concerns, the blade is very blunt. Unlikely people with safety concerns would want to wear these, but just to be clear: Not suitable for Children under 3 years old. 

These Folding Pen Knife Cufflinks can be worn on ANY dress shirt with Shirt Cuff Adapters.

Dimensions (L x W x H): 19mm x 8mm x 4mm (approx.)

Weight per cufflink: approx. 3.78g (light)