The plastic or metal sleeves at the end of shoelaces are called Aglets (or "Aiglets"). The word "aglet" (or "aiglet") comes from Old French "aguillette" (or "aiguillette"), which is the diminutive of "aguille" (or "aiguilee"), meaning "needle". They prevent the lace ends from fraying, they make the laces easier to hold, and they make them easier to pass through the eyelets.