•Dual Drive indexing flex head design is meant for use with 1/2" dual drive sockets with 22mm outer body hex
•Most 1/2" dual drive sockets in the market are 22mm on the outside, making this wrench compatible with them
•The retention ring in the head of the wrench holds the sockets in place while in use
•Can be used in a locked or unlocked position allowing for use in tight spots
•Reversable
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