This innovative small bobbin clamp can hold any type of bobbin threads-no more tangles! Simply slip the soft plastic bobbin over bobbin thread and insert into spool. easy to use and the thread stays put! Tidy up your thread bobbin storage & eliminate the clutter and frustration caused by tangled tails or loose ends - adapt our easy, effective and awesome Thread Savers and stay better organized. Thread clamp-- Cute little accessories that embrace your spools to prevent unraveling of threads , Easy to put on and equally easy to remove - Come packaged in a set of 48 pc - no need to buy every few days - Reusable design that allows you to use these over and again for years - offer great value in the long run .Small parts-Not for children under 3 yrs.