There is room in everyone's heart.
Room for a dangling zirconia or diamond for example.
Imagine how the stone reflex the sunlight when your keyholder is walking at the beach wearing the 14 carat gold In my Heart chastity key around her neck.
The In my Heart chastity key is handmade and the stone of your choice is dangling in the middle of the heart.
The heart is ca 22x22 mm and 3mm thick.
The beard of the key is 2.5mm thick.