Please read the profile before purchasing!! Important notes are included. By purchasing, you agree to the terms. Finger cots in 3 colors (different colors are also available) I am an amateur, so I cannot answer detailed questions about the materials... Please understand that they are discounted accordingly. The approximate size is shown in the photos, so please refer to them. (※The inner diameter of the finger cots is 16mm-17mm.) For the finger cots, you can use round rings or C-rings according to the thickness of the groove. What are finger cots... They are craft tools used to open and close or hold parts such as round rings and C-rings. Use them by putting them on the thumb of your non-dominant hand. How to use finger cots: ・Put the finger cot on the thumb of your non-dominant hand. ・Insert a round ring or C-ring into the groove of the ring. ・Use flat-nose pliers or pliers to open and close the ring by moving the cut part of the ring back and forth. They are very useful tools for making accessories(^^♪ Thank you for your consideration.