Is this a breaker bar?

No. It extends your wrench handle for controlled leverage. Use a proper breaker bar for heavy torsion and a torque wrench for final torque specs.

Which size should I choose?

Match your job's largest fastener size: Mini ≤14 mm, Regular 14–24 mm, Medium 24–32 mm, Large 32–46 mm. If you're between sizes, choose the larger range.

Will it work with Allen, Torx (TX), or XZN keys?

Yes—when used with the corresponding Allen/hex keys, Torx (TX), or XZN wrenches. Keep the wrench fully seated in the fastener before applying force.

Can I use it on a torque wrench?

Not for measuring torque. The extension changes the effective lever length and will give inaccurate torque readings. Use it to break loose fasteners, then switch to a torque wrench directly for accurate final tightening.

What material is it made of?

Hardened, chrome-plated steel with a compact, offset head design for knuckle clearance in tight spaces.

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Mueller-Kueps Wrench Extender

$60

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SKU: SKU:745-099

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Status : In Stock

Size Mini - (≤14 mm)
$60 Regular - (14–24 mm)
$76 Medium - (24–32 mm)
$123 Large - (32–46 mm)
$223 Multi Access Wrench extender
$69

Quantity

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Add Safe Leverage to Any Wrench in Tight Spaces

A compact extender that multiplies torque on stubborn fasteners without resorting to pipes. Works in confined areas where breaker bars won’t fit. Hardened, chrome-plated steel body with offset head for knuckle clearance. Designed for professional shop use; not a breaker bar.

Specs

Spec

Detail

Coverage

Four sizes cover ≤14–46 mm

Sizes

Mini (≤14 mm), Regular (14–24 mm), Medium (24–32 mm), Large (32–46 mm)

Compatibility

Open-end and box wrenches; Allen/Hex keys; TX (Torx); XZN (triple-square)

Material / Finish

Hardened steel / Chrome-plated

Primary Use

Controlled leverage in limited swing room

Choose Your Size (Quick Guide)

Mini — service lines, under-hood work, small assemblies
Regular — most automotive and equipment fasteners (14–24 mm)
Medium — suspension, hubs, and larger assemblies (24–32 mm)
Large — heavy-duty applications (32–46 mm)

What It Works With

Open-end and box wrenches
Allen/Hex wrenches
TX (Torx) wrenches
XZN (triple-square) wrenches

How to Use (3 Steps)

Seat the wrench fully on the fastener.
Hook the wrench extender onto the wrench handle.
Pull steadily; avoid sudden jerks for best control.

Safety Notes

Follow the fastener’s torque spec.
Keep the wrench fully seated before applying force.
This is not a breaker bar; use appropriate technique.