Ko-Ken

Experience the pinnacle of Japanese engineering with our premium selection of Ko-ken Tools. Celebrated globally by professional mechanics and automotive technicians, Ko-ken specializes exclusively in manufacturing world-class sockets, ratchets, and socket accessories. By focusing entirely on what they do best, Ko-ken delivers an unmatched level of precision, ultra-tight tolerances, and legendary durability that easily outperforms standard tool truck brands.

From their highly coveted, ultra-compact Z-Series line—engineered specifically for modern, tight engine bays—to their heavy-duty impact sockets and specialized automotive tools, every piece is manufactured in-house in Japan using advanced metallurgy. When you choose Ko-ken, you aren’t just buying a tool; you are investing in "Convincing Quality" that offers smoother back-lines, lower profiles, and a lifetime of reliable performance.

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  • 1/2 Sq. Dr. Stud Puller 16mm 75mm

    1/2 Sq. Dr. Stud Puller 16mm 75mm

    1/2 Sq. Dr. Stud Puller 16mm 75mm
    $88.82 USD
    $88.82 USD
  • 1/2 Sq. Dr. Stud Puller 13mm 75mm

    1/2 Sq. Dr. Stud Puller 13mm 75mm

    1/2 Sq. Dr. Stud Puller 13mm 75mm
    $88.82 USD
    $88.82 USD
  • 1/2 Sq. Dr. Stud Puller 10mm 70mm

    1/2 Sq. Dr. Stud Puller 10mm 70mm

    1/2 Sq. Dr. Stud Puller 10mm 70mm
    $77.60 USD
    $77.60 USD
  • 1/4 Hex Dr. Form Tie 70mm

    1/4 Hex Dr. Form Tie 70mm

    1/4 Hex Dr. Form Tie 70mm
    $18.28 USD
    $18.28 USD
  • O Ring for 2 1/2 Sq. Dr. - 158mm

    O Ring for 2 1/2 Sq. Dr. - 158mm

    O Ring for 2 1/2 Sq. Dr. - 158mm
    $36.94 USD
    $36.94 USD
  • O Ring for 2 1/2 Sq. Dr. - 114mm

    O Ring for 2 1/2 Sq. Dr. - 114mm

    O Ring for 2 1/2 Sq. Dr. - 114mm
    $28.42 USD
    $28.42 USD
  • 70mm hex sockets)" >
    1" Sq.Dr. O-Ring (for >70mm hex sockets)
    70mm hex sockets)" data-quick-add-button="add" data-product-options-count="1" >

    1" Sq.Dr. O-Ring (for >70mm hex sockets)

    1" Sq.Dr. O-Ring (for >70mm hex sockets)
    $11.52 USD
    $11.52 USD
  • 1" O Ring

    1" O Ring

    1" O Ring
    $2.36 USD
    $2.36 USD
  • O Ring for 1 1/2" Sq. Dr. - 114mm

    O Ring for 1 1/2" Sq. Dr. - 114mm

    O Ring for 1 1/2" Sq. Dr. - 114mm
    $25.68 USD
    $25.68 USD
  • 5/8" O-Ring

    5/8" O-Ring

    5/8" O-Ring
    $1.78 USD
    $1.78 USD
  • 1/2" O-Ring (for larger hex sizes)

    1/2" O-Ring (for larger hex sizes)

    1/2" O-Ring (for larger hex sizes)
    $1.34 USD
    $1.34 USD
  • 1/2" O-Ring

    1/2" O-Ring

    1/2" O-Ring
    $1.37 USD
    $1.37 USD
  • 3/8" O Ring (for larger hex sizes)

    3/8" O Ring (for larger hex sizes)

    3/8" O Ring (for larger hex sizes)
    $1.34 USD
    $1.34 USD
  • 3/8" O Ring

    3/8" O Ring

    3/8" O Ring
    $1.14 USD
    $1.14 USD
  • 1/4" O Ring

    1/4" O Ring

    1/4" O Ring
    $0.88 USD
    $0.88 USD
  • O Ring for 3 1/2 Sq. Dr. - 183mm

    O Ring for 3 1/2 Sq. Dr. - 183mm

    O Ring for 3 1/2 Sq. Dr. - 183mm
    $156.00 USD
    $156.00 USD
  • O Ring for 3 1/2 Sq. Dr. - 158mm

    O Ring for 3 1/2 Sq. Dr. - 158mm

    O Ring for 3 1/2 Sq. Dr. - 158mm
    $149.54 USD
    $149.54 USD
  • 1/4 Sq. Dr. Universal Socket 7/16 12 point 39.1mm Aerospace

    1/4 Sq. Dr. Universal Socket 7/16 12 point 39.1mm Aerospace

    1/4 Sq. Dr. Universal Socket 7/16 12 point 39.1mm Aerospace
    $27.87 USD
    $27.87 USD
  • 1/4 Sq. Dr. Universal Socket 5/16 12 point 34.6mm Aerospace

    1/4 Sq. Dr. Universal Socket 5/16 12 point 34.6mm Aerospace

    1/4 Sq. Dr. Universal Socket 5/16 12 point 34.6mm Aerospace
    $27.53 USD
    $27.53 USD
  • 1/4 Sq. Dr. Universal Socket 3/8 12 point 35.1mm Aerospace

    1/4 Sq. Dr. Universal Socket 3/8 12 point 35.1mm Aerospace

    1/4 Sq. Dr. Universal Socket 3/8 12 point 35.1mm Aerospace
    $27.87 USD
    $27.87 USD
  • 1/4 Sq. Dr. Universal Socket 1/4 12 point 31.8mm Aerospace

    1/4 Sq. Dr. Universal Socket 1/4 12 point 31.8mm Aerospace

    1/4 Sq. Dr. Universal Socket 1/4 12 point 31.8mm Aerospace
    $27.53 USD
    $27.53 USD
  • 1/4 Sq. Dr. Universal Socket 1/2 12 point 40.1mm Aerospace

    1/4 Sq. Dr. Universal Socket 1/2 12 point 40.1mm Aerospace

    1/4 Sq. Dr. Universal Socket 1/2 12 point 40.1mm Aerospace
    $27.87 USD
    $27.87 USD
  • 1/4 Sq. Dr. Socket 9/32 12 point 22mm Aerospace

    1/4 Sq. Dr. Socket 9/32 12 point 22mm Aerospace

    1/4 Sq. Dr. Socket 9/32 12 point 22mm Aerospace
    $4.50 USD
    $4.50 USD
  • 1/4 Sq. Dr. Socket 9/16 12 point 24mm Aerospace

    1/4 Sq. Dr. Socket 9/16 12 point 24mm Aerospace

    1/4 Sq. Dr. Socket 9/16 12 point 24mm Aerospace
    $5.78 USD
    $5.78 USD