Sensor adaptors are for use with the HeadBlade Sport and Classic models. 

Adapter or adaptor? We're not quite sure. Over the years we've used both and still get confused. Ever stare at a word so long it stops looking like a word? Adapter.

Don't like Atra-type blades? This Sensor-type adaptor allows you to use Sensor (or Sensor Excel) compatible blades with your HeadBlade; whether you have the Sport, or the Classic HeadBlade. Happy HeadBladers are the best HeadBladers.

Sold in singles.  

***Not recommended for use with the HeadBlade ATX or HeadBlade Moto***