I don't want this to sound like a really dumb question, but what are the scalpel blades for?
Obviously for cutting, but just what exactly? And, how do you control them without the handle? If I have a penknife with a razor sharp blade, would that be equivalent?

Now a comment on the tweezers. I have a pair that has a small magnifying glass incorporated. Works great for those pesky little stickers!
If you think you can, you can. If you think you can't, you can't. Either way, you're right.