Maintenance Parts

Outsider Flat Box Wheel Extension Kit

  • SKU: 4-862 | UPC: 815966023594


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Now: $44.99
MSRP: $49.99
Was: $49.99


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Questions? Prefer to order directly over the phone? Call: 800.227.7713

  • SPEED UP YOUR FINISHING | Extend the versatility of your LEVEL5 flat boxes with this handy kit.
  • VERSATILE | With the kit installed, you can fill paper or metal 90 degree corner beads in less than half the time of doing it by hand.
  • SIMPLE INSTALLATION | It takes less than 5 minutes to retrofit any LEVEL5 flat box with Outsider wheel extenders and bead rail discs.

Frequently Bought Together

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Below are the items included in this tool set:


For more details or to purchase by telephone, call us at 800.227.7713


With LEVEL5 "Outsider" wheel extensions, you can use a flat box to coat outside corner beads at an unprecedented speed. This kit will pay for itself on the first job in a matter of hours.

Check out this video for a full overview of how to install your "Outsider" Wheel Extension Kit:



Once the kit is installed, simply "hook" the guide disc that now resides just inside each box wheel onto the outside corner of the bead and start finishing corners. It's that easy! The box will self-guide on the corner bead making the finishing process effortless while saving hours of finishing and sanding time.

"Outsider" wheel extensions will provide a perfect corner on nearly all types of rectangular paper-faced metal, bare metal and vinyl corner beads. It is important to note that they do not need to be removed from the flat box once installed; you can seamlessly move from flat joints to corners during the finishing process.

PRO TIP - Many of our professional drywall finishers use a LEVEL5 7-inch MEGA flat box with Outsider wheel extensions installed as a dedicated bead boxing setup. This offers an ideal finishing width as well as great mud capacity.



7-Year Warranty

100% Satisfaction Guaranteed

LEVEL5 makes workhorse drywall finishing tools that set the standard for quality & reliability.

We back all of our tools with the strongest warranties in the industry and work hard to provide our family of finishers with the best customer service possible.

Do you have questions about your LEVEL5 Tool(s)? Call our toll-free support line at 866.562.4229 (local: 913.631.0804) or send us an email at Our support team is available Monday through Friday, 7:30am to 4pm Central Time.

Manufacturer's  Warranty

For its full line of automatic drywall finishing tools and accessories, LEVEL5 Tools, LLC. ("LEVEL5") offers a full seven (7) year warranty to the original owner that these products will be free from defects in material and function. This warranty is valid only in the USA, Canada, Australia, the United Kingdom and Europe. A one (1) year warranty applies in all other countries/markets.

Terms & Conditions

  • The Warranty applies to the original owner and is not transferable.
  • The Warranty is limited to repair or replacement of the product, and does not cover direct, indirect, consequential, incidental or any other type of damage resulting from its use.
  • The Warranty does not cover normal wear, misuse, negligence, fire, theft, loss or intentional damage.
  • All shipments to the LEVEL5 facility must be freight paid. LEVEL5 reserves the right to determine whether to repair or replace any product covered under the Warranty. Discontinued products may be replaced with newer models when necessary.
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