This RAW Stainless Steel Shredder is ~2x stronger than Aluminum and most importantly it’s less reactive with plant materials. So this RAW Stainless grinder is less likely to alter the flavour or your material – which is KEY!!! Plus, because it’s SO much stronger it doesn’t wear down like plastic or aluminum. The only downsides are that it costs a LOT more to make and it’s heavier. Our goal is always to make you the best of the best and offer choices so you can decide which grinder is right for you.