VARIOUS MANDRELS & RIVNUTS - The rivet nut tool kit comes with 15 mandrels M3 M4 M5 M6 M8 M10 M12 6-32 8-32 10-32 10-24 1/4-20 5/16-18 3/8-16 1/2-13, and 236pcs assorted rivnuts to meet a wide ...