There is a gap of smart design at the ring which can be fastened to tweezers. While clipping the ring onto the straight tweezers used to isolate natural eyelashes, you can dip the glue so convenient during the application procedure. Also you can still wear it on your finger as usual V breaches/grooves have different sizes at the fanning cup edges, which can wipe extra glue for volume lashes and keep the roots bonded into one cluster. Deeper V grooves work for 6D-9D volume fans, and shallow one works for 3D-5D volumes Rapid fanning cups could keep the glue from flowing out, extending the glue drying time and maintain good performance Made of white PP material, non-toxic, odorless, tasteless, harmless to human 100 PCS in each box, disposable, clean and cost effective