Blink comb brush can be used to comb lash extensions throughout the application process to ensure that no eyelash extensions are sticking together.  Lash technicians should be able to comb from the base of the eyelash extensions to the tips without it catching on anything.  If the comb is catching or pulling in any way, extensionists should check through their lashes to ensure that all attachments are individual.  This comb can also be used before a fill procedure, through brushing the lashes, any loose extensions will come off.  
Two-in-one tool for eyelashes and eyebrows
Comb can be used to groom eyelash extensions
Brush can be used to smooth eyebrows into shape