All Font Fixation brand stamps are manufactured to be used on all metals. The product and listing photos on this website are primarily on 22g stainless steel from www.stampingblanks.com Some metals are harder than others, for example butter or steak knives, and we do not recommend use on steel of this hardness level. Our stamps are covered under warranty for 1 year from date of purchase and covers the original purchaser. Stamps purchased from "destash" or "second-hand" groups are not covered under warranty. "Simple Dimple" stamps are manufactured on 1/4" shanks and are made to fit in most ring jigs. Simple Dimple designs usually fit on 1/4" wide cuffs, because all Simple Dimple design stamps are .5mm-5.5mm, and 1/4" cuffs are 6mm wide. "Hefty Hitter" stamps are manufactured on 3/8" shanks. "Fat Bottom Shanks" are stamps that are manufactured on 1/2" shanks. While these size design stamps are rated for stainless steel use, some of these designs are quite detailed and may require the "tilt-and-tap" method to get a full, solid impression. We always recommend using a solid surface that has force transferred directly to the floor (such as a stamping post), using a 2lb steel mallet, and not having any sandbag or such force deadening agent under your anvil. For more information on how to get better impressions, please see our YouTube video "Is My Stamp Defective" at: www.youtube.com/c/FontFixation Best impressions for larger and more detailed stamps are always in softer metals, like aluminum, brass, copper, pewter, and nugold. If you are a seasoned and skilled stainless steel stamper, you should have little-to-no difficulty with our larger/more detailed stamps in stainless steel. If you are a beginner stamper, we recommend you start with softer metals like those listed above, and as your skill level increases it should be easier to transition to stainless steel. Want to see more examples or get tips on stamping? Request to join our Facebook group, "Font Fixation's Fabulous Friends" at www.facebook.com/groups/FontFixation -- Answer the three questions and we'll get you in the group! If you have an error or defect in your stamp, please email FontFixation@gmail.com to get your stamp replaced under warranty, or for instructions on how to purchase a new individual stamp if out of warranty.