1.Material: Stainless steel lid + high quality glass body. 2.Convenient: Manually operated, no batteries needed. fits in your hand perfectly.You will not feel uncomptable and tired when you grinding.The wide opening glass body ensures you to fill your spices easily. 3.Keep your spice fresh: The grinder set was designed to maintain the flavor of your spices for a long time and keep them out from dust and moisture between uses or in storage. 4.Easy to use: Each of our grinders contains an adjustable ceramic coarseness. So whether you like a fine or coarse grind, simply twist to adjust it thereby making it effortless to grind.(Turn clockwise to coarse,Turn counter clockwise to fine.) 5.NO mess: The grinding mechanism is on the top of each mill so that your salt, pepper or spices goes only where you want it and not all over the kitchen table.