Plastic box -- The screw sets are well packed and sorted in plastic boxes, so there is no need to worry about damage or disorder, and it is convenient to take out the correct screws. Stainless steel -- These screws are made of high-quality stainless steel, high strength, no rust, and can be used for a long time. 1000pcs -- 1 Box Screws: M1x3 100PCS, M1x4 100PCS, M1x5 100PCS, M1.2x3 100PCS, M1.2x4 100PCS, M1.2x5 100PCS, M1.4x3 100PCS, M1.4x5 100PCS, M1.7x5 100PCS, M1.7x6 100PCS. Heat treatment -- We adopt the stronger material to make up this assortment box. we enhanced the hardness of the screws by heat treatment which can efficiently prevent slip and break. Application -- It is widely used in household, commercial and industrial machines, such as watches, glasses, computers, electronic products or any other repairs that require small screws., Weight: 0.1763698096 pounds, Manufacturer: Hilitand