can by reversing the control 76 decrease the spring tension by moving the arm 36 from the original slot 38 to the slot 46 to assist in such movements the operator may with a different tool not shown in his right hand bias the arm 36 outwardly from the housing 20 so that the arm 36 can be moved over the intermediate portions 42 which separate adjacent slots a difficulty frequently encountered in automobile repair particularly in the trunk area is that there is not sufficient room available in which to swing a socket wrench of the type illustrated through a sufficient angle to accomplish the desired work thus the operator may have room only to move the arm 36 half the distance required to shift the arm 36 from the slot 38 to the slot 44 to allow the work to continue in this type of circumstance the operator uses his right hand to engage the hexagonally shaped shank with an open jaw type wrench 74 thus to hold the tool 50 at an intermediate position as the operator with his left hand ratchets the wrench 72 to a new position which will enable him to again lift the wrench 72 toward a position.