The clear quartz gem foot (15mm) attaches to all Omnivos and Biosonics tuning forks. People use the gem foot to amplify energy and vibration transmitted but the tuning fork. It is best used with weighted tuning forks. The smooth crystal makes it easy to smoothly slide the tuning fork along the body while it is vibrating. Recommended for the Otto 128 and Om 136.1.
The gem foot comes with a small hex wrench and screen to secure the foot to your tuning fork.