This product didn't fit the Dewalt D28110 Angle Grinder. My grinder is a 4.5-in grinder and I was hoping that a 4.5-5-in cut-off guard would fit. However, the collar where the guard would have mounted is 1.75-in in dia. whereas the existing model has a collar mount of 2-inches. I had no choice but to return the merchandise for a refund. The refund was handled professionally and promptly.