It use spring pressure to regulate reinforced shaped objects and is used to tighten and loosen threaded fittings Make from 65 steel materials which have good resistance, rusts resistance and excellent oxidation resistance, which can ensures long terms using Widely used in machinery equipment, industrial production of shock absorption, can meet your different needs in daily The star locking washe is a of the necessary accessories in most mechanical equipment, it have a variety of roles in fixing, supporting and damping Total 9 size 360pcs in a box, different size can meet your different needs, Manufacturer: NEWFT