Under the twist off top is a secret compartment for sewing needles, folded money, medication, toothpicks, etc.
Enclosed is a stainless steel ball chain to wear alternately as a pendant or use the chrome key ring. An O ring in the cap keeps contents secure. Arrives in small black drawstring pouch.Inside depth at center bottom 2 3/4”
Inside depth at sides is 2 1/4”
Inside diameter 1/4”