A heat sink for removing heat from a heat-generating device includes a fin combination (10). The fin combination includes a plurality of fins interconnected together, each fin including a body (12), a flange (14) extending from the body and bent from an edge of the body, a tab (16) extending from an outer edge of the flange, a slot (17) formed in the body, and a detent (160) formed at a junction portion between the tab and the flange. The slot of a fin receives the tab of an adjacent fin. The detent of the adjacent fin engages with the flange and the body of the fin at a position near the slot of the fin, whereby the fin combination has the fins firmly connected together.