The Cool Tools blog posted a review of several alternatives to the ubiquitous, badly design, barrel handle X-Acto knives. The Fiskars Easy Change Knife is the favorite and so I bought two via the posting's associates link. They both have NO grip on the blade and are dangerous. Do not buy that version. There seem to be 2 versions of the knife in the world.
I contacted Fiskars and they sent me two replacements that are awesome! The replacements are Fiskars Easy Change Fabric Knife (3 blades) 164010-1001. The only visible difference between the two is that the Fabric Knife's has a gray tinted, translucent cap (rather than untinted). I hesitate to provide a product link as none that I found show the packaging. If you do find a package image it should look like the image in this posting.
Thank you Fiskars for great customer service.