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hair roller 
Instrument around which a lock of hair is wrapped to make it curl.
hair roller pin
Pin stuck through the roller to hold the lock of wrapped hair in place.
roller
Cylinder whose length depends on the length of the lock of rolled hair and whose diameter depends on the desired curl size.
wave clip
Plastic pin with interlocking teeth used to secure a lock of hair.
bobby pin
Bent filament with tightly closed arms; it is used to secure a section of hair by holding it firmly in place.
hair clip
Metal pin with elongated jaws that is used during styling to separate out sections of hair not being worked on.
barrette
Bobby pin with a clasp; it is used as adornment or to secure a lock of hair or the whole head of hair.
hairpin
Bent filament with spread arms that is used to loosely secure a section of hair such as a chignon.
