Compact, flat design for convenient storage in drawers and tool cabinetsMolded ABS resin case holds up to rigors of daily useSpecificationsItem #DescriptionContentsDriveSAE / Metric187748211-Piece Impact Socket Drawer Set5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4" 1877482 Impact Socket Adapter 1/4" to 3/8" X 2" OAL, Extension 3/8" X 3" OAL, Extension 3/8" X 6" OAL3/8"SAE