This is only compatible with some keyboards that support the Hall Effect.

Not compatible with standard PCBs but fit standard keycaps

Confirmed compatible keyboards are:
Wooting 60HE, Corsair K70 MAX, and SteelSeries APEX PRO (Non-RGB)

Specs:

• Switch Type - Linear, Hall Effect
• Bottom-out Force - 52.0g
• Spring Length - Single Stage 16.0mm, NAS wire
• Top Housing Material - PA12 NYLON
• Bottom Housing Material - PA66 NYLON
• Stem Material - POM
• Full Travel - 4.0mm
• Mounting pins - 2pins
• Factory Lube - Lubed
• 1 unit = 10 switches