Guides

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  • Kelvin 07 spinner with its bits

    Screwdriver bits explained: Phillips, Torx, square and hex

    Four bit shapes cover almost everything in a home. Knowing which is which stops stripped heads, and explains why multitools carry the sets they do.
  • Kelvin Retractor with bits stored inside the handle

    Why bits go missing, and how in-body storage fixes it

    Every household has a screwdriver and a bag of bits that do not live together. The Retractor puts the bits inside the handle and locks them there. A look at how it works.
  • Kelvin 36 SL with its case and pouch

    Kelvin 36 SL: who the slim 36 is for

    Same thirty-six tools, a slimmer body, 8 ounces, and a case. The SL was designed for smaller hands and lighter carry. Here is what changed and what did not.