Note: The quantity is determined by the weighing of precision instruments, please allow a numerical error of about 2%1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!2. Please allow 1-3cm measuring deviation due to manual measurement.Package Includes:20pcs x M3 Rivet Nuts20pcs x M4 Rivet Nuts20pcs x M5 Rivet Nuts10pcs x M6 Rivet Nuts10pcs x M8 Rivet Nuts5pcs x Nut Rivet Mandrels(M3, M4, M5, M6, M8)1pcs x Rivet GunsMaterial: body: SteelMaterial: handle cover: RubberNote:This item doesn't apply for steel nut,just for alloy nut(M3,M4,M5,M6,M8) and Iron nut(M3,M4,M5,M6)Specifications:Rivet Nut Material: Aluminum alloyType: Flat head rivet nutNut Thread Size: M3, M4, M5, M6, M8Features:This nut rivet tool is suitable to be used in car, trailers, and furniture repair, or even boat building. Also for repairing tools and farm equipment.It is an universal tool in the home and workshop. The rivet tool is ideally used for aluminium blind nut rivets.Includes wrench to hold handles and adjust mandrels.For nut rivet mandrel sizes M3/M4/M5/M6/M8.Robust, ergonomic tool made of steel with non-slip handle.