High-quality materials - The screw set is made of nylon, which is acid and alkali resistant, insulating, anti-interference, heat-insulating, wear-resistant and anti-corrosion. /li> Easy to use - The threaded screw range includes several popular metric sizes, well made, the threads are very clean, there are no sharp points and it is very convenient to use.< /li> 13 types - Including 60 nuts, 20 hex washers, 60 bolts, 60 washers, 60 M3 nuts, full specifications and sizes to meet your different needs. Boxed design - All screws are packed in a transparent PP -Arranged small parts box. The sorting is reasonable, the location is excellent and the overview is clear. You can store and carry these small screws conveniently. Applicability - Very suitable for installation between the circuit board and the machine board. Specification: Material: Nylon Color: Black Size: For details about size, please refer to the size chart Weight: 110 grams Includes: 60 M3 nuts 20 x M3 hex washer 20 x