.s . manufacturing facilities ( primarily hand tools and tool storage ) . as snap-on began acquiring businesses in the 1990 2019s , the company retained the 201cfirst-in , first-out 201d ( 201cfifo 201d ) inventory valuation methodology used by the predecessor businesses prior to their acquisition by snap-on ; the company does not adopt the lifo inventory valuation methodology for new acquisitions . see note 4 for further information on inventories