Material: Alloy steel housing and non-slip rubber handle cover. The nut rivet tool is suitable for use in car, trailer and furniture repair or even in boat building. Also for repairing agricultural tools and equipment. 5 Nut Rivet Mandrels: M3/M4/M5/M6/M8. Total 100pcs ribbed rivet nuts, M3(20pcs), M4(20pcs), M5(20pcs), M6(20pcs), M8(20pcs), to meet your different needs. Easy to Use Drill a hole in the workpiece, mount the appropriate rivet nut on the tool, insert it into the hole, press and then grind. Labor-saving design: Includes a wrench for holding handles and adjusting chucks, and a durable, ergonomic tool cover with a non-slip rubber hand. 86pcs Rivet Nut Set: All tools and accessories are packed in a plastic case for good storage and easy portable use. Note: The alloy and iron nut removal tool is not applicable to steel nuts, only applicable to alloy nuts (M3, M4, M5, M6, M8) and iron nuts (M3, M4, M5, M6). Body material: steel. Handle cover material: rubber. Wrench for