For when activating by hand isn't comfortable.
Weighted tuning forks are easy to activate against the heel of your hand - no accessory needed, and one less thing to carry. For most people that works perfectly well, and you won't need this.
 
But if striking against your hand is painful or awkward for you - arthritis, Raynaud's, nerve pain, or simply a sore hand that day - a rubber activator does exactly the same job with no impact on your palm. Tap the fork against the puck instead of your hand and you get the same clean activation, every time.
 
PLEASE NOTE - You don't need this to use your fork. It's here for the people who find it easier, and if that's you, it's worth the extra cost.
 
Shipping within Australia and New Zealand. Best added to a tuning fork order so it travels in the same parcel.