To perform operations efficiently at a stable posture even in such a narrow place as interfering with other things.

This stay unit is installed in both first and second turning shafts 2a and 2f passing through opposing one side and opposing other side of a case 1-1 installed in one end of a stay body 1 for socket wrench use, while it is equipped with a third gear 2c connecting an interval between gears 2b and 2e attached to both these turning shafts 2a and 2f in the case 1-1, and further it is provided with a ratchet handle side joint 1a assembling a ratchet handle to the first turning shaft 2a, and a socket wrench side joint 1b assembling a socket wrench to the second turning shaft 2f, respectively.