This tool was purchased to inspect the wall paneling for paint, in my 120 year old house I needed to do multiple coats of wall paneling grind. With 36 grit you can cover a 3 x 3 foot area in about a minute. The Makita grinder has enough power to get the job done. However, it is light enough to be used on the house wall from the stairs. I also have heavy two-handed sanders and have never been disappointed with Makita tools. And yes, you can use 7/8-inch discs with 5-inch shanks with this tool…