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Home : Tools : Special tools for Brace repair : Scissor Jack

Scissor Jack

Read 13 Reviews   |   Write a Review

Perform repairs where your arm can't reach. Our versatile Scissor Jack lets you perform tricky repairs inside an acoustic guitar with ease.

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Scissor Jack

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Item# Description In stock Price Quantity
0490 Scissor Jack Yes
3 or more $85.50  

Quantity prices apply to multiples of the same item number Selected currency  


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Magnets make tricky interior alignment easy!
Many hours, a pile of prototypes, and inspiration from luthier Freddie Cisneros, went into the development of our Scissor Jack. There's no other tool to match its versatility and ease of use for interior acoustic guitar repair work:
• Holding braces, repair cleats and bridge plates for gluing
• Aligning the sides of a crack for gluing
• Supporting a fretboard over a guitar body for installing frets
• Simulating string tension on an unstrung guitar top, for accurate bridge saddle work and neck resetting

The Scissor Jack has smooth thumbscrew height adjustment. Best of all, it's easy to add the flexible extension cable supplied with the jack, so you can operate it deep inside the guitar where your arm can't reach!

One more cool feature: it comes with magnets. They help you position the jack and align exterior cauls in lots of versatile ways that make tricky clamping a LOT easier.

The Scissor Jack has sturdy machined aluminum, brass and steel parts for durability and long life in the busy repair shop. The glue-resistant polyethylene cauls are specially recessed for the supplied magnets (the jack can be used with or without the magnets).

Minimum height        2-1/4"        (57.15mm)
Maximum height 4-3/4" (120.65mm)
Caul diameter 1-3/4 (44.45mm)
Magnet diameter 1" (25.4mm)
Extension cable length        10-7/8"        (276.22mm)

Tips for using the Scissor Jack:

Use cauls to help spread the clamping pressure. Here the jack is applying pressure to a soundboard X-brace, while sitting on a caul that spans two back braces.

Here we're using exterior cauls on both sides of the guitar, to give the jack something to push against safely.

Magnets make caul alignment easy. A few examples:

With a steel washer (or magnet) outside the guitar, the jack hangs upside down, ready to hold a crack repair caul in place.

Notice the exterior cauls.

The gluing rig was easy to make; simply a 1/2" repair magnet screwed to a wooden dowel.

Here's a curved wooden caul that matches the curve of the guitar side. It has a magnet attached that holds the jack.

Warning: Seriously strong magnets!
The magnets supplied with our Scissor Jack are made of rare-earth neodymium boride. They can magnetize, degauss, or re-polarize any ferrous or magnetic material, including electric guitar pickups. Keep them away from magnetic storage media such as floppy discs, cassette and video tapes, as well as pacemakers, computers, CRTs, TVs and watches. Keep these magnets out of the reach of children! If more than one magnet is swallowed, they can attach to each other and cause intestinal perforation or blockage, which can be fatal.

Workin' in the soundhole with the scissor jack and a mirror
Workin' in the soundhole: it's crowded in here!
Workin' in the soundhole with the scissor jack and a mirror Read more

In this issue:
Dan Erlewine's got a repair that needs repairing again. Working inside the guitar body is too tight for comfort, but Dan shows some tools and tips that make it easier.

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 Ratings and reviews
Scissor Jack
Scissor Jack
4.5 out of 5 stars
Based on 13 ratings Write a Review
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Displaying 11 – 13 < 1  2
4 3-03-2011
Scissors Jack and Reinforcing Diamonds

The Jack works well in positioning the reinforcing diamonds across a crack in the plate. Both the knob and the extension cable come off too easily. I suggest a spring ball detent to help hold them on.

Jack J  Livermore, CA USA Read my reviews (7)
3 11-20-2010
Scissor jack

This tool is helpful when smaller soundholes or thinner bodies prevent my arm and/or hand to access far away braces. Those same limitations make it difficult to attach the provided tightening cable once the clamp is situated. I recommend (and have) taping the cable to the clamp.
Be advised that over torquing will break the cable or undo the button.
It also would be nice if the cable was a just a few inches longer.......

manny salvador  NYC
5 11-07-2010
One of my favorite inventions

After I got the hang of using it, I use it for 75% of my internal brace repairs. It works great at handling the bigger brace glue-ups that need good pressure.

GuitarRepairShack  Calgary, Alberta Read my reviews (20)
Displaying 11 – 13 < 1  2 /\ Top of Reviews

Shown on page 22 of our latest catalog.
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