The fine blade will take all the hair off. I use a medium blade for my winter trace clips but that is just me. In the spring/early March, I go over the winter trace clip with a fine blade since spring is coming and the horses have started shedding.
I switched to the medium blades several years ago and have been much happier with the clip jobs. Since I use smaller clippers with #10 blades on the legs and face, it's so much easier to blend than when using the fine blades.
I do not use the fine, I use the medium. Except mine are not marked by numbers (10, 30, etc.) like Oster blades OR with "fine" etc. Mine are marked with three capital letters? I believe ALS or similar? I'll have to check.
I have a chestnut - the medium blade left him chestnut color. The fine blade took him right down to a bald pumpkin color. If you're new to clipping, the medium blade is more forgiving. I used the medium blade for the fall shows when I wanted him to look presentable & then used the fine blade in early winter to hold us over until spring. Love the clippers!
I just got mine and used the fine for a trace clip. It was a touch shorter than the 10 blade oster but not too noticeably. I like it because my pony will grow it all back in a week anyway. If I were clipping a horse with less hair to begin with I might try the medium, but I'm still not sure it's worth the extra 50 bucks.
I got them in the mail yesterday. I like them a lot. Do you guys use them to clip the face and legs? If not what other clipper do you use? I don't want the hair length to be shorter in one place than the other.