Review on JIYINGDUO Diamond Sharpener Sharpeners Sharpening by Samantha Cameron

I ordered this sharpener to see how it compares to keeping a sharpener in my bag. For now I'm sticking with the puck because it's more convenient. Where this little sharpener fails is in the hinges/handles. The handles are very light and the hinges are rigid. Therefore, it cannot be opened with one hand like a balisong knife (also called a butterfly knife). I would give it five stars if it worked like a balisong. A better loop might be enough to get the job done. Squid Industries' "Squidy" trainers have the same lightweight grips and work great (but cost at least 5x more).