A hand-held rivet nut or rivet bolt tool comprising: a) a body including - a base having a bottom surface, two sides and a bore therethrough; - a pair of handles respectively pivotally connected to the sides ofbase; and - driven member disposed between the handles and having two sides respectively pivotally connected to the handles by links; b) a sleeve including - a central line; and - a hole formed in the central line of the sleeve; wherein - the sleeve is axially movably mounted through the bore of the base and includes a bottom portion extending from the bottom surface of the base and the bottom surface of the base and connected to the driven member; c) a mandrel (40, 40A) rotatably mounted through the hole of the sleeve and including a shaft having: - an outer surface; - a top portion; and - a threaded portion (412, 412A) formed on the top portion of the shaft, characterized in that said connection between the sleevee and the driven member comprises: - an annular positioning groove formed in the outer surface of the shaft \; - an annular mounting groove formed in an inner surface of the hole of the sleeve; and - a positioning ring seated in the annular mounting groove of the sleeve and including an inner portion extending from the inner surface of the hole of the sleeve and engaging the annular positioning groove of the shaft of the mandrel (40, 40A). a) a body including - a base having a bottom surface, two sides and a bore therethrough; - a pair of handles respectively pivotally connected to the sides ofbase; and - driven member disposed between the handles and having two sides respectively pivotally connected to the handles by links; - a base having a bottom surface, two sides and a bore therethrough; - a pair of handles respectively pivotally connected to the sides ofbase; and - driven member disposed between the handles and having two sides respectively pivotally connected to the handles by links; b) a sleeve including - a central line; and - a hole formed in the central line of the sleeve; wherein - the sleeve is axially movably mounted through the bore of the base and includes a bottom portion extending from the bottom surface of the base and the bottom surface of the base and connected to the driven member; - a central line; and - a hole formed in the central line of the sleeve; wherein - the sleeve is axially movably mounted through the bore of the base and includes a bottom portion extending from the bottom surface of the base and the bottom surface of the base and connected to the driven member; c) a mandrel (40, 40A) rotatably mounted through the hole of the sleeve and including a shaft having: - an outer surface; - a top portion; and - a threaded portion (412, 412A) formed on the top portion of the shaft, characterized in that said connection between the sleevee and the driven member comprises: - an annular positioning groove formed in the outer surface of the shaft \; - an annular mounting groove formed in an inner surface of the hole of the sleeve; and - a positioning ring seated in the annular mounting groove of the sleeve and including an inner portion extending from the inner surface of the hole of the sleeve and engaging the annular positioning groove of the shaft of the mandrel (40, 40A). - an outer surface; - a top portion; and - a threaded portion (412, 412A) formed on the top portion of the shaft, characterized in that said connection between the sleevee and the driven member comprises: - an annular positioning groove formed in the outer surface of the shaft \; - an annular mounting groove formed in an inner surface of the hole of the sleeve; and - a positioning ring seated in the annular mounting groove of the sleeve and including an inner portion extending from the inner surface of the hole of the sleeve and engaging the annular positioning groove of the shaft of the mandrel (40, 40A).