ITEM NAME:200Pcs Stainless Steel E-Clip Assortment Kit 1.5/2/3/4/5/6/7/8/9/10mm Circlip zg.A E-clip is a fastener that holds components or assemblies onto a shaft or in a housing, bore when installed in a groove. Once installed, the exposed portion acts as a shoulder which retains the specific component or assembly.