• Ko-ken 3/8" Drive Extension Universal Socket — 12mm, 6-Point, 250mm Front View
  • Ko-ken 3/8" Drive Extension Universal Socket — 12mm, 6-Point, 250mm mechanical drawing
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Ko-ken 3/8" Drive Extension Universal Socket — 12mm, 6-Point, 250mm

$107
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SKU: 13146M.250-12

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    Ko-ken 3/8" Drive Extension Universal Socket — 12mm, 6-Point, 250mm Front View

    Ko-ken 3/8" Drive Extension Universal Socket — 12mm, 6-Point, 250mm
    Reach Fasteners at an Angle Without Swapping to a Wobble Setup

    Reach Fasteners at an Angle Without Swapping to a Wobble Setup

    This extra-long 250mm extension universal socket combines reach + angle access in one tool. Run it on a 3/8" square drive, hit 12mm hex fasteners with a 6-point opening, and work around obstructions where straight extensions won’t line up. Built with an integrated joint and listed with “socket-with-magnet / magnet” tagging for added fastener control during removal/installation.

    Specs

    Spec

    Detail

    Input Drive Size

    3/8"

    Drive Shape

    Square

    Type

    Extension Universal Socket

    Output Size

    12mm

    Opening

    6 Point

    Overall Length (L)

    250mm

    Product Dimensions (Line Drawing)

    D1: 18mm / D2: 19mm / H: 8mm

    Why You’d Use This Instead of a Standard Extension + Socket

    • Fewer pieces to stack: reach + angle access in one tool (helps in tight bays and behind brackets).
    • 6-point 12mm contact for better grip on hex fasteners compared to 12-point in high-load situations.
    • Extra-long 250mm reach for recessed fasteners and deep access points.
    • “Magnet / socket-with-magnet” tagging indicates added fastener retention support when working overhead or in awkward positions.

    Common Use Cases (Shop Examples)

    • Brackets and clamps where a straight extension can’t line up square to the bolt head.
    • Recessed 12mm hardware behind hoses/lines where you need both reach and a slight angle.
    • Fasteners above frames/crossmembers where dropping hardware is a risk (magnet-tagged for retention support).

    How to Use (Best Practices)

    1. Seat the 6-point end fully on the 12mm fastener.
    2. Keep the joint angle as small as the job allows (less angle = better torque transfer).
    3. Break the fastener loose smoothly, then spin it out once it moves freely.

    In the Box

    • 1x Ko-ken 3/8" Drive Extension Universal Socket, 12mm, 6-Point, 250mm (13146M.250-12)

    Safety Notes

    • Universal joints reduce effective torque transfer at higher angles—avoid extreme angles when breaking stubborn fasteners.
    • Always confirm full seating on the hex to reduce rounding risk (especially on tight or corroded 12mm hardware).
    • Prop 65 notice applies (California).