Material: alloy steel body and rubber non-slip handle cover. The nut rivet tool is suitable to be used in car, trailer and furniture repair, or even boat building. Also for the repair of agricultural tools and equipment. 5 nut rivet chucks: M3 / M4 / M5 / M6 / M8. Totally 80 pieces ribbed rivet nuts, M3 (20 pieces), M4 (20 pieces), M5 (20 pieces), M6 (10 pieces), M8 (10 pieces) to meet your various needs. Easy to use , just drill a hole in the workpiece, assemble the appropriate rivet nut on the tool, insert it into the hole, press and then finish. Labor-saving design Work: Includes wrench to hold handles and adjust chucks, sturdy and ergonomic tool cover with non-slip rubber hand. plastic for good storage and easy portable use. Note: Apply for alloy nut and iron detach tool, not apply for steel nut, just for alloy nut (m3, M4, M5, M6, M8) and the iron nut (m3, M4, M5, M6)