This Japanese style pull saw fits into an 18 mm Olfa-style snap off knife handle. The Razorsaw is well made and cuts quickly. Bookbinders may find it useful to make small cuts while shaping wooden boards, trimming trenails, etc. There is another saw blade which I haven’t tried, the S-1162 serrated blade, designed for plastics, which might work on ethafoam. An easy and inexpensive way to add a saw to your tool kit. And whose inner 13 year old boy can resist the appeal of a pocketable saw?