Curved Crystal Hair Eraser - Magic Crystal Hair Remover Stone for Legs, Back and Body - Exfoliating Painless Hair Removal for Silky Smooth Skin - Beechwood. Palm sized and with a unique CURVED Nano Tech Glass surface & Beech Wood Easy Grip Handle the Temple Spring CURVED CRYSTAL Hair Eraser makes it easier to remove hair from those tricky curved areas, like Knees, Shins & Ankles.