3 tool boxes in 1.Small Features- 10.5 inches wide x 5 inches long x 4 inches tallMedium Features- 13.5 inches wide x 7.5 inches long x 5.25 inchestall- 2 auxiliary parts tray that detach from the lid- Driver bit compartmentLarge Features- 17 inches wide x 10inches long x 8 inches tall- 2 auxiliary parts tray that detach from the lid- Double Driver bit compartment