• Ko-ken 1/2" Quick Release Starter Bundle - Nut Grip & Z-Series Front View
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Ko-ken 1/2" Quick Release Starter Bundle - Nut Grip & Z-Series

$361
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SKU: KB-4B5ZB

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    Ko-ken 1/2" Quick Release Starter Bundle - Nut Grip & Z-Series Front View

    Ko-ken 1/2" Quick Release Starter Bundle - Nut Grip & Z-Series
    A Complete 1/2

    A Complete 1/2" Setup for Faster, Safer Fastener Work

    Build a serious 1/2" drive foundation in one shot: a flexible 72-tooth Z-Series quick-release ratchet, a pin-less double universal joint for access, and a full 11-piece NUT GRIP® socket set. This bundle is built for technicians who want fewer dropped fasteners, better reach in tight spots, and quicker socket changes on the ratchet.

    Specs

    Spec

    Detail

    Drive Size

    1/2" square drive

    Ratchet

    Z-Series, 72-tooth, flex head, quick release (4725ZB)

    Universal Joint

    1/2" double universal joint, pin-less mechanism (4772Z)

    Socket Set

    NUT GRIP® socket set, 11 pieces (RS4450M/11)

    Why NUT GRIP® Matters

    • Holds nuts/bolts more securely than a standard 6-point socket (especially helpful when you’re working one-handed or at an awkward angle).
    • Reduces “drop risk” into skid plates, frames, engine bays, and undercarriage areas.
    • Great for starting fasteners in tight pockets where fingers can’t follow the hardware.

    Why You’ll Want the Pin-less Double Universal

    • Cleaner profile and fewer snag points than pin-style universals.
    • Helps reach bolts around housings, brackets, frame rails, and crowded accessory areas.
    • Pairs perfectly with the flex-head ratchet for “two-angle” access (ratchet flex + U-joint articulation).

    Best Use Cases

    • Starting and removing fasteners where the nut/bolt wants to fall out of the socket.
    • Reaching fasteners tucked behind lines, hoses, guards, or brackets.
    • General 1/2" drive service work where you want quick socket swaps (quick release) and better clearance (flex + U-joint).

    What’s Included

    • 4772Z — The 1/2" double universal joint with a pin-less mechanism.
    • 4725ZB — 1/2" Square Drive 72 tooth flexible Z-Series ratchet with Quick Release Function.
    • RS4450M/11 — A full 1/2" NUT GRIP socket set with 11 pieces.

    In the Box

    • 1x 1/2" Quick Release Z-Series flex-head ratchet (4725ZB)
    • 1x 1/2" pin-less double universal joint (4772Z)
    • 1x 11-piece 1/2" NUT GRIP® socket set (RS4450M/11)

    Warranty + Important Notes

    • Backed by Ko-ken USA warranty support (see site warranty page)

    • California Proposition 65 warning applies (see product page notice).