Your kitchen knife feels like a butter knife and your multi-tool edge is gone. You don't need a $200 whetstone or a trip to the shop. This diamond grit sharpener slides out of a pen-style body, extends to 120mm, and puts a proper edge back on in under a minute. One side is round for curved blades, the other is flat for straight edges. The knurled collet locks it in place so nothing wobbles mid-stroke. Clip it to your pocket, drop it in a tackle box, or leave it by the bench. Diamond grit doesn't clog like ceramic and it'll keep cutting through years of daily use. 245mm deployed, 140mm stowed. 12-month warranty
