 However, other modern Jewish Rabbinical authorities, such as Rabbi Avraham Yeshayahu Karelitz and Rabbi Yaakov Yisrael Kanievsky, consider electric razors, particularly rotary models which use "Lift and Cut" heads made by Philips, to work in the manner of primitive razors, and consequently prohibit their use.According to some interpretations of the permissive view, these shavers can be used if the lifters attached to the shaver's cutters are removed first.According to other interpretations of this view, these shavers can be used without removing the lifters, and, indeed, according to some, it may even be preferable "not" to do so.