When we refinished our basement, we opted to keep the old doors since they were solid core and in pretty decent shape. However, the knobs were garish gold monstrosities left over from the 1970s. These black matte knobs fit our new decor much better and were a breeze to install. I put in 5 of them in less than half an hour, using just a screw driver. If this was a fresh install, I'm sure it would take longer to drill the hole in the door and chisel out the slot for the strike plate, but a templatSee full review