Specifications: Dimensions of the hand tool: approx. 27x9.7x2.7cm. Box dimensions: 31.5 x 15 x 4 cm. Body Material: Steel. Handle cover material: Rubber Wrench for holding handles and adjusting chucks For rivet chucks in sizes M3/M4/M5/M6/M8. This tool is primarily used to install aluminum threaded rivet nuts at home, shop, and farm. Car repair or customization. Assembly of boats, trailers and furniture. Repair of equipment and agricultural equipment. Contents: 1 riveting gun with key. 5 Rivet Chucks: M3/M4/M5/M6/M8 20 x M3 Threaded Inserts 20 x M4 Threaded Inserts 20 x M5 Threaded Inserts 10 x M6 Threaded Inserts 10 x M8 Threaded Inserts 1 plastic storage box 1 user manual (English language not guaranteed).