Celebrate the ones who unlock the best parts of life. This heartfelt card from &M Studio features an array of beautifully illustrated skeleton keys in all shapes and sizes on the front, paired with the warm sentiment “Friends are the key to joy.” On the back, a sweet surprise—a delicate heart-shaped lock, a quiet reminder of the connection that ties it all together. Perfect for besties, soulmates, or anyone who holds a special place in your heart.