Trend diamond credit card sharpener

Discussion in 'Tool Talk' started by StuG, Oct 8, 2021.

  1. StuG

    StuG Member

    Just purchased the diamond credit card sharpener from screwfix, noticed it hasn't got which grit engraved on each side 300 or 600, how do you tell, feeling with your hands isn't really obvious
  2. I-Man

    I-Man Screwfix Select

    magnifying glass and lots of patience?
  3. rogerk101

    rogerk101 Screwfix Select

    What on earth is a credit card sharpener?
  4. GS63

    GS63 Member

    Try drawing a fingernail across it. I find it easy enough to tell visually if you hold it under a good light.
  5. WillyEckerslike

    WillyEckerslike Screwfix Select

    It's so that you can use a credit card for scraping silicone Roger. It puts a better edge on the card.

    Actually it's a diamond embedded metal sharpening stone the same size as a credit card.
    BillyBobToo and rogerk101 like this.

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