Every SLX herb grinder is machined from 7075 aluminum, the alloy of choice for precision applications - from high performance jet aircraft to Space-X rockets. With exceptional strength, perfect balance, and unparalleled durability, your SLX grinder will last a lifetime and then some. The coating is super low friction, so a SLX turns just as easily in 6 months as it did the day you got it. It repels even the stickiest resin buildup, keeping your grinder looking and spinning like new no matter how hard you punish it. Never sticks, never needs cleaning. What more could you want?