You an actually cut with these
The package says they're for scribing, which they are really got at, but I also used it to cut through some model parts (inner door panels of an AMT 1/25 mustang) because the regular Tamiya saw would have left too wide of a gap.
Nice for fine scale cutting.
A little pricey, but works well (though slowly) for scribing and cutting styrene. Recommend using in conjunction with a traditional scribe, or the back of a hobby blade.
Very handy but limited use
Very handy, very thin blades are great for opening panels such as doors or trunks.
Note: they will only fit in Tamiya TAM74111 handle.