I have an old Eskimo hand auger 8", and lazer blades fit it great. It has the folding handle.
307 does a good job and is as quick as anyone with turn around.
Laserdude, sharpening is done best with a jig to hold the blade at the right angle. If you change the pitch even a degree it won't cut for beans.
New blades run 15.00 and up from what I've seen, and sharpening or trading for sharpened ones is around 10 plus shipping.