The Pneumatic Hand Rivet Nut Kit -M3, M4, M5, M6, M8, M10 & M12 Kit works for rivet nuts in M3, M4, M5, M6, M8, M10, & M12 sizes in aluminum steel and stainless steel. The hand screw design is ideal for loading and unloading the nuts, and the ergonomic handle design for great user comfort.