Abstract: An improved tape measure for making an internal measurement from a member between generally parallel members of the type having a tape coiled in a housing having a tape hook external to the housing on an unattached end portion of the tape, and measurement lines and numerals on a concave side portion of the tape which increment from the hook and which can be read when the hook is pulled from the housing, wherein the improvement comprises: a non slip device positioned along an outside face portion of the hook so that when the outside of the hook is pressed against one member the hook will be less inclined to slip therealong. In a preferred aspect the above tape measure further comprises a belt clip having a downwardly extending arm attached to a broad side of the housing and a soft plastic gripping pad positioned on one of the belt clip arm and the broad side of the housing adjacent to the arm to provide better adhesion when the belt clip is engaged on a worn belt.