A straight razor is a razor with a blae that can fold into its handle. They are also called open razors and cut-throat razors, the latter particularly in the UK, New Zealand and Australia; this is a misnomer, because it is difficult to accidentally cut a throat with a razor if proper care is taken. A man is exceedingly unlikely to cut anything vital (like the trachea, carotid arteries, or jugular veins) while shaving himself. This is because shaving is done with the blade at approximately an angle of thirty degrees to the skin; a deep incision requires both the blade to be nearly perpendicular to the skin and the movement of the blade to be sideways. These circumstances are always avoided by an experienced shaver who always shaves in a direction perpendicular to the cutting edge of the blade.