■ THE ADJUSTABLE MAILER FIXTURE
Build airplane-style
boxes 10× faster.
We make a simple tool that helps you build airplane-style boxes 10× faster.
Watch it work ↓01 / THE EVERYDAY DIFFERENCE
Less wrestling.
More packing.
Position your blank. Press it into the guides. Finish the folds and lift out your mailer. Your hands do the work. The fixture holds the shape.
02 / SET IT TO YOUR BOX
A new size.
The same fixture.
Slide the rails and position the folding guides around your mailer blank. Tighten, fold, repeat.
- 01 Adjustable aluminum rails
- 02 Guides that support the folds
- 03 A manual tool for your packing table
WATCH THE ADJUSTMENT
Slide. Set. Fold.
Move the guides along the rails to change the working area. Both clips show the actual fixture at normal speed.
Choose the rail configuration for your mailer’s length and width. Box height is a separate measurement. See the size guide below ↓
03 / BOX STYLES & SIZES
Your mailer.
The right rail size.
Three rail sizes. Adjustable guides. Choose the size for your folded mailer.
Three sizes. Choose your maximum.
Both folded dimensions must fit within the limits below.
| Fixture size | Max. length (L) | Max. width (W) |
|---|---|---|
| Small | 5.90″ | 5.90″ |
| Medium | 9.84″ | 9.84″ |
| Large | 25.59″ | 25.59″ |
Measure the folded box—not the unfolded blank. Height is separate.
- L / Length
- The longer edge of the assembled box’s base.
- W / Width
- The shorter edge of the assembled box’s base.
- H / Height
- From the base to the closed lid. Include this measurement when you contact us about fit.
Made for airplane mailers.
One-piece corrugated boxes with a hinged lid, folding wings, and locking tabs—also called roll-end tuck-front mailers.
Not regular shipping cartons.
This fixture does not form four-flap RSC cartons. For unusually small or tall mailers, send us your dimensions and a photo so we can confirm fit.
Include L × W × H, units, and a link to your box or a photo of the unfolded blank. We’ll help identify the rail configuration you need.
ONE TOOL. A BETTER PACKING DAY.
Meet your next
bench essential.
$399
Box Builder Pro
Adjustable mailer-box folding fixture
We’ll confirm compatibility, availability, and shipping.
CONTACT
Questions?
Get in touch.
Send a question about the fixture, box sizes, or ordering. We’ll get back to you by email.