Abstract: An elongated chain master link is provided including a removable side link of substantially conventional construction but provided with a transverse opening intermediate the opposite end transverse bores formed therethrough adapted to receive groove master link pin ends therethrough. A retaining clip of elongated panel-like construction is also provided and constructed of spring material such as spring steel. The clip includes opposite end transverse openings formed therethrough and one of the end openings includes communicated large and small width portions while the other opening includes communicated greater and lesser width portions.