MSC INDUSTRIAL DIRECT CO INC

•Incremental Operating Margin and Adjusted Incremental Operating Margin

The Company defines Incremental Operating Margin as the change in year-over-year Income from Operations as a percentage of the change in year-over-year Net Sales and Adjusted Incremental Operating Margin as Incremental Operating Margin adjusted to exclude such items listed above from Income from Operations. The Company’s management believes that Incremental Operating Margin is useful because it shows the direction that operating profit margins are moving as a result of changes in net sales between periods, and that, by excluding the aforementioned items, Adjusted Incremental Operating Margin helps to show, on a comparable basis between periods, trends in the Company’s underlying business and results of operations. The Company believes that investors benefit from seeing results from the perspective of management in addition to seeing results presented in accordance with GAAP for the same reasons and purposes for which management uses such non-GAAP financial measures.