Abstract: A support bracket has a base member adapted for attachment to a particular measuring tool and a vertical member extends from the base member and it has a horizontal slot within its top edge which mounts a tape rule by way of the tape rule spring clip. The tape rule is oriented on the support bracket such that measurements may be made along a common baseline with reference to the measuring tool and a workpiece to be measured while, at the same time, measurements may also be made along a ruler edge of the measuring tool which is positioned at an angle with respect to the common baseline.