These tweezers can be sharp or straight and have a fine point if they are not then you will struggle with separation. These tweezers should also be relatively long- approximately 13 cm, this will allow your hand to stay clear of the lashes and not only gives you better vision but better control. They should not feel stiff, but move fluidly between your fingers. Tweezers that are stiff will eventually cause discomfort in your hands. It is best to purchase your tweezers from eyelash suppliers because they are specifically designed for the lash industry. I prefer straight isolation tweezers but that is my personal preference.