RK-50SP Eco More details #6-32~3/8"-16 (M4~M10) Spin-Pull-to-Pressure Eco-Pneudraulic Rivet Nut Tool RK-55SPS Ergo More details #6-32~3/8"-16 (M4~M10) Spin-Pull-to-Stroke Pneudraulic Rivet Nut Tool RK-59SPS Ergo More details 5/16"~1/2" (M8-M12) Spin-Pull-to-Pressure Pneudraulic Rivet Nut Tool RK-987N Remote Intensified More details For Setting Large RivetNuts up to 3/4" (M20) RK-P3MTI Module for Rivet Nuts More details For installation of rivet nuts, for use in robotic or fixtured applications.