240 piece nuts, bolts, washer assortment set. Made From Carbon Steel. In A Strong Poly Storage Case. Bolts: 10 Pieces - M4 x 12mm 10 Pieces - M4 x 20mm 10 Pieces - M5 x 16mm 10 Pieces - M5 x 25mm 10 Pieces - M6 x 20mm 10 Pieces - M6 x 30mm 5 Pieces - M8 x 25mm 5 Pieces - M8 x 40mm 5 Pieces - M10 x 16mm 5 Pieces - M10 x 40mm Lock Washers: 20 Pieces - M4 20 Pieces - M5 20 Pieces - M6 10 Pieces - M8 10 Pieces - M10 Nuts: 20 Pieces - M4 20 Pieces - M5 20 Pieces - M6 10 Pieces - M8