These lock nuts are made of stainless steel, which is one of the forms of metals, making them last longer than other nuts on the market With a nylon insert, these lock nuts greatly reduce loosening under vibrations and torque. for both indoor and outdoor use corrosion resistance to regular steel. Feature - Color: Silver. - Material: Stainless steel. - Size: 1.00X1.00X0.80cm/0.39X0.39X0.31 inch. - These lock nuts 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. - Have strong anti-rotation ability, which can prevent the locking nut from weakening and loosening under vibration and torque, thus reducing the clamping strength. - Advanced stainless steel nylon locking nut, 7 common sizes, general, convenient, easy to use, professionals and DIY users. - It is manufactured with professional technology to ensure the of the product and can work for a long time. Package list: nuts