Stanley Utility Knife Another one of those must have tools, in fact I have four of them and they all hold replacement blades, is the Wallpaper Knife or Razor Knife. Watch the cost of these razor knifes. The paint department at Home Depot has a brand for about $5. These inexpensive knives are self locking and is the brand I show in the video.
The Home Depot Tool Department carries the Stanley Utility Knives for about $10 each. I like this one much better. It automatically feeds the new blade when necessary. The draw back to me is that to extend the blade you have to loosen and tighten the lock screw every time you want to use it. Other than that, it's a go!