ADJUSTABLE--This grinder is with one adjustable coarseness grinding mechanism. You could adjust the coarseness just by turning the black plastic knob on top of each salt or pepper mill.EASY TO USE AND REFILL, PORTABLE AND KEEP CLEAN--The high quality clear glass can make you see the spices inside and show you when to refill . All you have to do is unscrew the top, fill spices or refill them when necessary.PERFECT FOR MANY TYPES OF SPICES--Peppercorn, sea salt, black pepper, cumin, cloves, sesame and many other spices . SGrinders with covered lid caps to keep your spices fresh longer.MODERN DESIGN, A PERFECT GIFT.--The sophisticated design makes a good impression on the dinner table. It is one good choice to make a wonderful gift.PLEASE KINDLY NOTE THESE GRINDERS ARE EMPTY, SALT AND PEPPERS ARE NOT INCLUDED.