(2) Grinder 6” Wheel Guards, Gray, 4 Hole Mount, 1 7/8” Arbor Ctr. , 2 1/4” Deep. Grinder wheel guards are 6 3/4” outside diameter so it fits a 6” grinding wheels. 4 hole mount that are 1 5/8” on center. Center arbor 1 7/8” in diameter. Wheel cover bolts present. Unsure if older Delta\ Rockwell guards as I can find no part # designation. Please see pictures for complete detail of overall quality and features.