You won't be able to wait to get creative with the Number 11A PenBlade Craft & Hobby Knife by PenBlade, Inc. The Number 11A retractable straight-edge blade cuts through a variety of materials including EVA foam, styrene, Worbla, yard, rubber, thin ribbon, fabric, and so much more. For long-lasting sharpness and durability, the knife features a surgical-grade stainless steel blade (not carbon steel). The end of the handle has a handy ruler marked in inches and millimeters, for quick and easy measuring. Left- and right-handed users will both be comfortable with this ambidextrous knife. It is designed with push-button blade retraction for instant safety and storage (no caps necessary). The package includes three Number 11A blade craft knives.
This knife is so awesome. I've been wanting one for awhile and it cuts very nicely. Love the fact that it is retractable, in the closed position in has a groove to cut thread, and it has a built in ruler in inches (up to 3 in) and in centimeters (up to 7.5 cm). This is a great tool to have.