Save money and replace the nut rivet mandrel instead of buying a new riveter. Features: The riveting nut pole and the l-ead nut the mouth to possibly need to be assembled are laid one side together. Easy to use and prevents loss. Fits most standard nut riveters. Made of high tensile steel. Come with a sturdy and colorful plastic box for store and file the size of different chucks. Features: Size: M3, M4, M5, M6, M8, M10, M12 (all included) Main Color: Black Main Material: Metal Package Size: 150 * 100 * 40mm / 5.9 * 3.9 * 1.6in Package Weight: 330g / 11.6ounces Packing list: 7 * chuck