The Cole & Mason 505 Salt Mill is built around our precision grinding mechanism. 505 Salt Mills feature a diamond sharpened ceramic precision mechanism that will smoothly produce perfect size grains every time. Conveniently select between fine or coarse granules by simply adjusting the knob featured on top. Refilling is as easy as unscrewing the same knob and pulling the top open. 505 Salt Mills are made of high quality acrylic that will last for years to come. Pair with the Cole & Mason 505 Pepper Mill to complete the set!