Marla Aaron ball trundle lock ring in yellow gold. Marla Aaron'S Beloved Trundle Lock Ring In Sterling Silver And Gold Balls. Trundle Is A 16Th Century Word That Means A Small Wheel Or Roller. Ours Open In The Most Delightful Way. So They Are Rings But They Are Also Locks Or Charm Holders Or Even One Could Make A Chain Of Them. The Trundle Lock Ring Is Especially Comfortable Because It Is Shaped With Flat Sides-Like Ones Actual Finger. Wear Alone Or Stack. Sterling Silver, 14K Yellow Gold