EZ, sweet attachment, I'm a retired flooring mechanic we used to use special high dollar saws for undercutting door casings but still had to use hand saws to finish tight places. These multitools changed everything no set little to no damage and they cut better and faster. They are all so great for removing thin set when replacing tiles. I have a 39.00 HF tool. My Nephew has the Rockwell and my son in law has Milwaukee cordless they all work great for undercutting. I'm sure the life span of the HF tool will be shorter than the name brands.