Marson 325RN/ M34604 heavy duty manual tool ideal for installing larger size Rivet Nuts and Thread-Serts. Model M34604 will install 10-24 through 3/8"-16, and 5mm through 10mm threaded inserts in both aluminum and steel. Features a Quick-change mandrel design and an easily adjustable stroke. Supplied with 1/4"-20 mandrel and nosepiece only. Additional mandrel/nosepiece sets are available for installing other threaded insert sizes. Weight: 4.25 lbs.