(3) #12 size grinding plates and (1) sharp stainless knife. 3/16 (4.5 mm) burger grind. 5/16 (8 mm) chili grind. 5/8 (16 mm) coarse grind. And a Stainless steel grinder knife. GO STAINLESS if you do a lot of meat grinding and sausage stuffing. Plate measures 2 3/4 across. Knife is 2 3/8 tip-to-tip. 1/2 (12mm) center sq hole. Easy clean-up and storage. Plates are 2 3/4 diameter. Fits virtually all brands of electric or manual grinders that use the standard #12 size. We can usually help. Most plates are also available in #5, #8, #22 and #32 sizes. Butcher-Baker offers a lifetime NO RUST GUARANTEE on this purcha se.