All types of knives need to be sharpened, and for all these years, the taxidermy and tanning trades have had no alternative other than to re-grind circular currier knives when they got dull. The “Circular Knife Sharpener” can be used on all circular currier knives for basic in-house sharpening. Sharpener comes in ready-to-use kit and allows you to sharpen your blade 3 to 4 times before it needs to be re-ground and turned.