■ THE ADJUSTABLE MAILER FIXTURE
Build mailer
boxes faster.
Flat blank. A few folds. Ready to pack.
A simple tool for the boxes you build all day.
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.
Rail adjustment up to 65 cm (25.6 in). This is the fixture’s adjustment range—not a guaranteed maximum box size or box depth. Compatibility depends on your mailer’s blank, folds, and dimensions. For hinged-lid airplane mailers, not regular four-flap shipping cartons.
03 / THE RIGHT KIND OF BOX
Airplane boxes.
You know the ones.
The one-piece corrugated mailers with an attached hinged lid, folding wings, and locking tabs. Also called roll-end tuck-front mailers.
For compatible mailer blanks. Not for regular four-flap shipping cartons. Send us your dimensions and a photo to confirm fit.

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.