I believe this is something you hold to stimulate your palm and massage it. I only tried it out, and haven't carried it around. It seems to be old, and the metal fittings are dull. Shipped via Mercari delivery. I have a pet cat. A blue silicone keychain with a distinctive spiky design. - Color: Blue - Material: Silicone - Shape: Spiky design - Use: Keychain Thank you for looking.