• Ko-ken 3/8" Sq. Dr. Extension Bar — 1000mm Front View
  • Ko-ken 3/8" Sq. Dr. Extension Bar — 1000mm mechanical drawing
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Ko-ken 3/8" Sq. Dr. Extension Bar — 1000mm

$103
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SKU: 3760-1000

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    Ko-ken 3/8" Sq. Dr. Extension Bar — 1000mm Front View

    Ko-ken 3/8" Sq. Dr. Extension Bar — 1000mm
    Extra-Reach 3/8

    Extra-Reach 3/8" Extension for Deep & Recessed Fasteners

    When a bolt is buried deep in a frame rail, under a cab, or behind guards, a standard extension won’t get you there. This 1000mm (1 meter) Ko-ken 3/8" square-drive extension bar gives you the reach to run sockets down long access holes and service deep-mounted fasteners on equipment, trucks, and industrial assemblies.

    Specs

    Spec

    Detail

    Brand

    Ko-ken

    Drive Size

    3/8" square drive

    Drive Shape

    Square

    Type

    Extension Bar

    Overall Length

    1000mm

    Body Diameter (D Size)

    18mm

    Reference Length (L Size)

    1000mm

    UPC / Barcode

    4991644062003

    Approx. Weight

    968 g

    Why You’d Use a 1000mm Extension

    • Reach fasteners inside boxed frames, subframes, and crossmembers
    • Access bolts behind skid plates, belly pans, guards, and covers
    • Run sockets down long access tubes/holes without stacking multiple extensions
    • Keep the ratchet/impact tool outside the tight zone while the socket reaches the fastener

    Best-Fit Use Cases (Heavy Equipment / Diesel)

    • Under-cab and chassis hardware where swing room is limited
    • Deep-reach fasteners on guards, covers, and structural assemblies
    • Service access points on larger machines where the fastener sits far from the opening

    How to Use (3 Steps)

    1. Seat the socket fully onto the extension’s square drive.
    2. Guide the socket down to the fastener, keeping the extension as straight as possible.
    3. Apply steady force with your ratchet/handle (or appropriate drive tool) once fully seated.

    In the Box

    • 1x Ko-ken 3/8" Sq. Dr. Extension Bar — 1000mm

    Notes for Better Results

    • For best control, avoid side-loading the extension (keep it aligned with the fastener).
    • If the fastener is stubborn, ensure the socket is fully seated before applying torque.
    • Consider a wobble or universal solution only when you truly need angle—straight extensions are strongest and most stable.