Material made of stainless steel which anti-rust and anti-corrosion well 12 Models meets your demands:M1.2 nut, M1.4 nut, M1 x 3.6, M1.2 x 3.6, M1.4 x 2.4, M1.4 x 2.6, M1.4 x 2.8, M1.4 x 3.0,M1.4 x 4.0, M1.4 x 4.5, M1.4 x 6 Rivit hand, M1.6 x 4.5 Ideal Tool Kit: Mini screws and nuts assorted kit with mini screwdriver which can meet your different diamand. Well Package: It comes with plastic round case and light weight which can hlep you organize the different size screw . And it portable,convenient to distinguish,store and use easily. Widely Application: It perfects for electrical connections on household and commercial appliances, automotive and marine uses in which the power source has a threaded/bolt-type connection