Overall, a great high quality product. I definetely recommend Vyper product.
See Before You Buy
See why +150,000 customers ditched their old shop chairs and made the switch to Vyper.
ACME ROD KIT
The proven, tested and trusted acme rod system has been used for hundreds of years. We took the acme height adjustment concept and made it fit the Vyper Chair. With this height adjustment, you can quickly & easily adjust the height of your chair by simply spinning the seat to go up & down. **The Acme Rod Attachment can replace the Quick Height Adjustment. **The Acme Rod Attachment cannot be used on Lay-Down Creeper, Low-Pro or Robust Steel Pro.
Trusted by +150,000 Customers
Trusted by +150,000 CustomersMECHANICAL
Made in USA
Great Add-Ons To Have
EZ-LIFT KIT
If you want to upgrade your existing Vyper Chair, specifically a Robust or Elevated Steel Max model, with the new EZ-Lift adjustment, you're in the right spot. The EZ-Lift Kit...
$165
EZ-LIFT KIT
If you want to upgrade your existing Vyper Chair, specifically a Robust or Elevated Steel Max model, with the new EZ-Lift adjustment, you're in the right spot. The EZ-Lift Kit...
$165
Subtotal
$90
$90
Safe, Durable
& Reliable
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Shipping
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Back Guarantee
Proudly American Made
Designed, manufactured, and packaged
in Green Bay, Wisconsin. Every chair,
every cart, every creeper.
Trusted by +150,000 CustomersWho It's Built For
The proven, tested and trusted acme rod system has been used for hundreds of years. We took the acme height adjustment concept and made it fit the Vyper Chair.
With this height adjustment, you can quickly & easily adjust the height of your chair by simply spinning the seat to go up & down.
**The Acme Rod Attachment can replace the Quick Height Adjustment.
**The Acme Rod Attachment cannot be used on Lay-Down Creeper, Low-Pro or Robust Steel Pro.
**If you have a EZ-Lift model ("V" cutout in by the bend in the legs) and want to convert height adjustment, please give our customer service team a call at (920) 301 3822.
30-Day 100% Money Back Guarantee
Limited Lifetime Warranty
Used By The Pros Everyday.
Trusted, tested, and used by the best in the industry.
ACME ROD KIT
USED BY THE PROS EVERYDAY.
Trusted, tested, and used by the best in the industry.
JAY LENO
JAY LENO'S GARAGE
RICHARD RAWLINGS
GAS MONKEY GARAGE
BILL GOLDBERG
GOLDBERGS GARAGE
CHIP FOOSE
FOOSE DESIGN
BRIAN SCOTTO
HOONIGAN
ADAM LZ
LZMFG
01/06
Proudly American Made
Designed, manufactured, and packaged in Green Bay, Wisconsin. Every chair, every cart, every creeper.
Trusted by +150,000 Customers
Customer Reviews
Overall rating: 4.9 / 5 from 16 reviews.
Easy to install. The new part is updated so it can't be screwed out too far and cause problems.
I love this assembly, superior workmanship. I am fabricating my own design and incorporating this into my chair.
Works very well plus easy install
Added the acme seat lift. Recovering from back surgery so needed the ability to lower the seat more than what the quick release would allow. With it installed I can reduce the bending to some extent so that my back is not strained over time. Great stool and very stable. Thank you Viper for a well designed product.
The quick height adjustment is a great feature. However, I was missing the lower setting the acme screw provides. Originally, I thought rotating the chair to the desired height would be a pain. Not the case. You can spin that chair with one finger and hit your desired height in no time especially, if you lock a caster.
Great product and excellent craftsmanship
overall it makes the use of the chair better since you do not have to spin the base of the chair to turn
I love this attachment
Nice parts
The Acme Rod allows for a significantly lower chair/stool position. Much appreciated and the quality is awesome!
The rod is very solid. I go the Acme Rod because this allows the seat height to be a bit lower. Great Chair!
Quality product as usual. I like the acme rod for my short stool since it gets a little lower than the quick height setup.
Well I just needed that extra amount of adjustment plus I hope it makes swiveling easier without rotating the whole stool as I use it welding and constantly adjusting positions should make it easier. Very well built product.
Had the acme rod on my Robust Steel Max, so when I got my Elevated Steel Max I ordered with the Quick Height Adjust which works fine but does not swivel. I missed the swivel so I replaced it with the acme rod. Now all is right with my shop.
Exactly as described. The pieces are all well made and fit like they should
Frequently Asked Questions
Everything you need to know before you upgrade.
What accessories are available for Vyper chairs and stools?
The most-purchased Vyper accessories are the Adjustable Backrest, Adjustable Armrest, Big Boy, Tool Tray, and Sidekick. Each one solves a specific problem:
- Adjustable Backrest: Replaces the stock backrest with a 10° tilt and 4" of height adjustment, for buyers who want to dial in lumbar support exactly.
- Adjustable Armrest: A solid grip for sitting down and standing up, and most importantly, to improve posture / stability.
- Big Boy: Adds 7" of seat width, for larger frame buyers or anyone who wants more room and stability.
- Tool Tray: Bolts to the underside of the chair to hold sockets, loose bolts, and shop rags.
- Sidekick: Side-mounted attachment with cup holders, a tool holder, and storage for spray bottles, polishers, and shop towels.
All accessories are made in Green Bay, Wisconsin and ship with the same warranty and 30-day guarantee as the chairs themselves.
What's the difference between the Sidekick and the Tool Tray, and do I need both?
The Sidekick mounts on the side of the chair for what you're actively using (spray bottles, polishers, microfibers, a cold drink), while the Tool Tray bolts underneath for what you've already used or what might fall (loose bolts, dropped sockets, shop rags, small parts).
They're built to work together, not against each other. Detailers and fabricators who run the Complete Package (Robust Steel Max + Tool Tray + Sidekick) consistently say the two-accessory combo turns the chair into a real mobile workstation. Sidekick at hand for the polisher you're using right now, Tool Tray below for the spent microfibers and parts. If you can only pick one, the Tool Tray is the accessory most buyers later say they wish they'd added from day one.
Can I use the Big Boy and the Sidekick together on the same chair?
No. The Big Boy and the Sidekick cannot be installed on the same chair, they mount in the same location and you have to pick one. Our specialists at (920) 301-3822 can walk you through the right choice if you're not sure.
The decision is usually clean. If you're a larger-frame buyer (or an older buyer wanting more leverage when standing), get the Big Boy. If you're a detailer, fabricator, or anyone who works with supplies at the seat all day, get the Sidekick. The Adjustable Backrest, Adjustable Armrest, and Tool Tray all work with either choice, so you don't lose any other accessories by picking one over the other.
Is the Adjustable Backrest worth the upgrade over the stock backrest?
For most buyers, the stock backrest is built right and works exactly as designed. The Adjustable Backrest is the upgrade for the buyer who lives in the chair, taller height range, up to 10° of recline, and the ability to dial in the support position to your specific body and the way you actually work.
Roughly half of buyers add it during initial chair configuration. The other half buy it months later, after deciding they want to fine-tune the backrest position even further. Reviewers consistently describe it as the upgrade that turns the chair from "comfortable" into "I never want to get up." Compatible with the Robust Steel Max and Elevated Steel Max chairs, and pairs with either the Big Boy or the Sidekick.
Who should buy the Big Boy attachment?
The Big Boy adds 7" of additional seat width, built for two specific buyers: larger-frame customers (280 lbs and up, or anyone who finds the standard seat too narrow) and older buyers who want more leverage when sitting down and standing up.
Reviewers consistently call it a confidence upgrade. The wider seat means you don't have to perfectly center yourself when sitting, and the wider surface gives you something to push off when standing. It's the most-recommended upgrade in the Vyper review base for buyers in their 60s, 70s, and 80s. Available on all Vyper chairs except the Low-Pro and Robust Steel Sport. Cannot be combined with the Sidekick.
Can I add Vyper accessories to a chair I already own?
Yes. Every Vyper accessory is designed to bolt onto chairs already in your shop, you don't have to buy them at the same time as the chair. Roughly half of buyers add accessories during the initial chair configuration. The other half buy them weeks or months later, after deciding what they actually need.
The Tool Tray, Sidekick, Big Boy, Adjustable Backrest, and Adjustable Armrest all install with basic hand tools and ship with instructions and hardware included. If you bought your Vyper chair years ago, the accessories from today's lineup are still compatible with the standard chair models. Call (920) 301-3822 if you're not sure whether an accessory fits an older chair.
Which Vyper accessories work with the Low-Pro and Robust Steel Pro stools?
The Vyper Backrest add-on works on the Robust Steel Pro and the Low-Pro Backrest works on the Low Pro, for buyers who started with a stool form factor and decided they wanted lumbar support after the fact.
The Big Boy is not compatible with the Low-Pro, but is compatible with the Robust Steel Sport. The Tool Tray and Sidekick are designed primarily for the Robust Steel Max and Elevated Steel Max chair frames. For a stool-specific tool-holding solution, the Robust Steel Pro ships with a built-in stationary tool tray as a standard feature, no add-on required.
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