These cage nut manufactured with industrial strength, which can replace locking washers, prevent bolts from being exposed and provide better safety and firm fixation. Compared with locking washer, it has better performance because it is made of non-corrosive material. Features - Color: Black. - Size: 1.60X1.10X1.10cm/0.63X0.43X0.43 inch. - Material: Carbon steel. - The screws thread is very , clean and accurate without burr. The compact and force uniform screw thread is not easy to out of shape and slid in the process of rolling and installation. - The deep and clear flat cross head can make your working more easily and improve your work efficiency. - Easily mount your equipment using this convenient kit, which comes with everything you'll need to get the done. - With 2 different sizes cage nuts and screws packed in a transparent plastic box, meet your different needs. It is a for both professional and amateur. These multifunctional bolts and nuts are your must-have tools. - Includes 50pcs cage nuts and 50pcs screws. Packed in plastic box instead. Package list: nuts screws