1These circlips can be snapped into a machined groove on a dowel pin or other part to permit rotation but to prevent lateral movement 2Two basic types of internal and external can fit into a bore or over a shaft 3There are total 18 different sizes of circlips that you can use for different purposes and projects 4This set includes 225 pieces circlips so you do not have to worry about running out of circlips for quite a while 5All circlips are well packed and assorted in a resealable plastic box for convenient carry and storage