20-Piece Drive Tool Accessory Set is Ideal for all your 1/4, 3/8 and 1/2-Inch sockets, this set of drive tools give you the flexibility to tackle any project. Extension bars provide extra reach fo tight spaces, adapters allow you to use different drive size sockets with ratchets and universal joints are perfect for fasteners in a tight space or at an angle includes 11 extension bars in three drive sizes, 5 adapters across three drive sizes, 3 universal joints in three drive sizes and one shank adapter. This set is backed by the Craftsman Full Hand Tool Warranty. 20 Drive Tools in 3 Drive Sizes Include: 3 - 1/4" Drive Extension Bars (1-1/2, 3 and 6-Inch) 1 - 1/4" Drive 3/8-Inch Adapter 1 - 1/4" Drive Universal Joint 1 - 1/4" Hex Shank Adapter 4 - 3/8" Drive Extension Bars (1-1/2, 3, 6 and 10-Inch) 2 - 3/8" Drive Adapters (1/4 and 1/2-Inch) 1 - 3/8" Drive Universal Joint 4 - 1/2" Drive Extension Bars (1-1/2, 3, 6 and 10-Inch) 2 - 1/2" Drive Adapters (3/8 and 3/4-Inch) 1 - 1/2" Drive Universal Joint