Grabenkater -- This is my second attempt to post a reply; don't know where I went wrong. In case you're open to a "second opinion," here goes: If you can only buy one of the rasps, I'd recommend #49. I have both, but seldom use #50. While #50 has bigger (and more widely-spaced) teeth, #49 seems to me to remove more wood with the same amount of effort. Plus, #49 leaves shallower grooves in the wood, meaning less work to remove them with your next level of smoothing. Just my own experience. -- paulallen, tucson az