[High Quality]These assorted nuts and bolts and washers are made of premium alloy steel, which offers excellent rust resistance, resistance, high strength and , ensuring great performance in any environment. [Multiple Metric Sizes]The screw set provides lengths of button head, metric screws, nuts and washers. Including 16 sizes: M3x8mm, M3x12mm, M3x16mm, M3x20mm, M4x8mm, M4x12mm, M4x16mm, M4x20mm, M5x8mm, M5x12mm, M5x16mm, M5x20mm, M6x8mm, M6x12mm, M6x16mm, M6x20mm, total 1120pcs, meet different needs of . [Wide Applications]This metric bolt assortment kit is widely used in machinery, furniture, automobiles, motorcycle repair, 3D printers, computers, instruments, and electronic products. The screw threads are smooth, clear and precise, even force, easy to use. for the man. Colour:black Material:alloy steel Package Contents: 1120 x Metric Screw Assortment Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.