The GS-14 is a multi-function knife with a serrated blade. The serrations allow the utility knife to cut through tougher materials such as bread or allow it to be used with fruits and vegetables with thick skins and soft centres.
We sometimes get asked whether you can sharpen a serrated blade. In our opinion, the answer is no and manufacturers that say their sharpeners can sharpen a serrated blade are incorrect. So please do not try and sharpen your GLOBAL GS-14 Utility Knife.