About This Provides A Stable Base For Tamping: Works well in tamping on the side of the counter into the portafilter and provides such a nice tamping surface for both your bottomless and spouted portafilters Not Fit For Round Countertops: It has a corner edge, so if you have round counters it will not work for you. Ideal for countertops with greater than or equal to 1 1/2" thickness edge Protects Countertops: The silicone material effectively prevents scratches and dents from the tamper and portafilter Non-slip Grip: The mat grips the countertop well, keeping everything stable during tamping Easy to clean: The silicone rinses clean easily and is dishwasher safe