This coffee tamper is a one-piece, solid stainless steel coffee tamper. The coffee tamper handle and base are all one, which gives this coffee tamper an extra sturdy "hand-feel." It's a coffee tamper that will help you to get good extractions from most lever espresso machines.
When choosing a coffee tamper, lever espresso machines will have portafilter baskets with 53 millimeter diameters, and standard espresso machines will have portafilter baskets with 58 millimeter diameters, so you need to get the right coffee tamper in either case. If you have a lever espresso machine, this is likely the coffee tamper that you're looking for. Note that 52 millimeter coffee tampers will fit into either 52 or 53 millimeter portafilters, and it's a matter of preference which coffee tamper to get. If you're not sure, measure the diameter of your portafilter basket first.
Many people want a coffee tamper that fits snugly into the portafilter, and some prefer a millimeter (or so) of wiggle room, so that they can more easily manipulate the coffee tamper while tamping. But note that the coffee tamper doesn't get pushed down into the bottom of the filter basket (which can be slightly tapered). So it's the inner diameter at the top of the basket that you'll need to measure to size your coffee tamper correctly. This coffee tamper should fit in either case.
You should look at our article "How to Use a Coffee Tamper Correctly for Uniform Extractions" if you're not exactly sure how to use a coffee tamper correctly. With some simple technique, this coffee tamper will help you to make high quality extractions.
We recommend that you do not wash these coffee tampers in the dishwasher, because over time, the dishwasher will discolor the stainless steel finish of this coffee tamper. To clean, simply wipe this coffee tamper down with a damp cloth in soapy water. Your coffee tamper should not get "dirty" in the first place. And this coffee tamper is all one piece - so wiping it down is a cinch.