Use this replacement ceramic cutter blade with the cutters listed under the Pico Friends Animal Box Openers. To install the blade, remove the silicone animal from the cutter body while it's installed on the base. Use a screwdriver to remove the screw on the side of the cutter body. Once it's removed, the body swivels open to reveal the entire blade. Carefully remove the old blade and discard safely. Then place the new blade in the designated slot with the blade side on the right. Swivel the body back and replace the screw. Place the silicone animal back over the cutter body and it's ready to be used again.