This WORKPRO 320-Piece Mechanic’s Tool Set with Storage Case (model W003055) helps your work and life with various sockets, ratchets, extension bars, wrenches, nut drivers in inch and metric sizes, screwdriver bits, hex keys and adapters that are built to last. For easy recognition, tools are stamped with markings to help you identify metric and SAE socket sizes. All tools are packed neatly in a blow-molded case for convenient storage and transportation. All tools meet or exceed ANSI standards. This set includes: 3-40Cr Heat treated and chrome plated Quick-release ratchets (1/4″, 3/8″,� 1/2″) 152-Cr-V chrome plated Sockets (6-point, 8-point and 12-point) in both inch and metric sizes 4-Extension bars 8- Cr-V Combination wrenches� 1- Magnetic handle 12- Cr-V Nut drivers in inch and metric sizes 96- S2 Screwdriver bits: PH, PH0, PH1X2, PH2X4, PH3X4, PH4, SLOT: 3/32, 1/8X2, 5/32, 3/16X2, 7/32X2,1/4X3, 9/32 SLOT: 2, 2.53, 3.5, 4, 4.5, 5X2, .5, 6, 6.5, 7 PZ, PZ0X2, PZ1X3, PZ2X3, PZ3X3, PZ4, T, T6, T7, T8, T9, T10, T15, T20, T25, T27, T30, T35, T40; HEX: H1/16, H5/64, H3/32, H7/64, H1/8, H9/64, H5/32X2, H3/16X2, H7/32, H1/4, H1.5, H2, H2.5, H3X2, H3.5, H4X2, H4.5, H5, H5.5, H6, SQUARE S0X2, S1X3, S2X3, S3X3, S4 40- Cr-V Hex keys� 4- 25mm 1/4″ Adapters 1- Drawer case with 3 layers