Makeshift blades, also known as SHIVS, are improvised weapons made from everyday objects such as knives, razors, or other sharp objects. They are often used in prisons and other places where weapons are not allowed. SHIVS are usually made out of materials that can be easily found, such as metal rods, pieces of wood, or even plastic. They are typically used for stabbing or slashing, and can be very dangerous if used improperly.