The Hot/Cold hammer is a simple but very effective tool for use during a facial treatment. Both sides of the hammer head simultaneously reach two different temperatures for both a hot and a cold treatment. Hot Treatment: One side of the hammer will reach a toasty hot temperature for use in stimulating blood circulation beneath the skin and to relax and open pores. Cold Treatment: The other side of the hammer reaches a frosty cool temperature. This provides a cool soothing effect to overheated or tired skin - great for use after a steam treatment. The cold hammer is a great way to close pores after you have finished a moisturizing treatment - locking moisture into the skin