A lock assembly for retaining a chain binder handle in a locked position includes a grip that has a first end and a second end. The second end of the grip insertably receives the chain binder handle. The first end of the grip curves toward the second end of the grip. A groove is defined between the first end of the grip and a body of the grip. A chain of the chain binder is positionable within the groove. A ring is operationally coupled to the grip. The ring is resiliently positionable over the chain after the chain is positioned within the groove. The chain is retained in the groove. The chain binder handle is retained in the locked position when the chain is positioned within the groove.