Features 1、[FIRMLY FIXED] This screw also comes with an expansion tube, which can hold items more stably without worrying about it falling off or loosening. 2、[NYLON PLASTIC] The nylon plastic of the expansion tube has good toughness and will not become brittle, fractured or damaged, ensuring long term stability. 3、[CARBON STEEL] The screws made of carbon steel are very strong, with good hardness, no rust, and no deformation after long term use. 4、[STORAGE BOX] We have provided a compartmentalized storage box for these screws, which can be closed easily, light weight and easy to carry. 5、[WIDE APPLICATION] You can use these screws to install curtains, lighting fixtures or accessories, bookshelves, wall or bookshelf mounts, audio equipment, walkie talkies, wall clocks. Specification Item Type: Self Tapping Screw Set Material: Carbon steel, nylon plastic Package List 40 x M5X25 Screw 30 x M8X40 Screw 40 x M6X30 Screw 20 x M8X60 Screw 30 x M6X30 Screw 30 x M6X40 Screw 20 x M8X40 Screw 1 x Storage Box