Stainless steel surgical blades, made to keep a sharp edge. For use with a surgical handle. Blades No. 10 (regular blade) and No. 12 (hooked blade) are for use with size No. 3 surgical handle; commonly used with cats, dogs, piglets and other small livestock. Blade No. 22 (regular blade) is for use with size No. 4 surgical handle; commonly used with calves and cattle.