T-Slot Hardware Kit
For trucks running a T-slot tonneau cover — Retrax and similar retractables that have their own exterior track down the outside of the rail. That track was built for mounting accessories, so instead of clamping to the bed rail, we bolt straight into it.
The kit fastens your STAPLL Fender Rack into the cover's own T-slot — no drilling, no clamping, and nothing that touches the cover's seal or travel. The rack becomes part of the same system the cover already gave you.
- Bolts into the track your cover already has
- No bed-rail clamping — the cover's seal and retraction stay untouched
- No drilling — nothing permanent, nothing modified
- Cover-specific: this is the kit for a T-slot cover
Not sure this is your kit? Look at the outside edge of your cover. A channel or track running its length means you have a T-slot — this is the one. If the cover just rests on the rail with no track, you need the Capper Lift & Seal Kit instead. They aren't interchangeable. Send us a photo if you're unsure and we'll tell you which you have.
- Ships in 1–3 business days. Learn more
- Hassle-free returns. Learn more
- Vehicle fit guarantee. Learn more
- Limited lifetime warranty on racks and 1 year on accessories. Learn more
- Easily install yourself, or have it professionally installed. Find a Certified Installer
- Customer support available 7 days/week.
Finish the build.
All accessories →- 1/2" H x 2.5" W x 10' L - Thick Dense 70A Neoprene Rubber
- 2x 10ft Rubber Rolls
- 20ft Butyl Seal Tape
- 8ft Large Bulb Seal
- 6ft Small Bulb Seal
- 5oz Tube Liquid Gasket Maker
Why buy from STAPLL? Because we don't just sell racks — we invented the category. STAPLL was founded by two brothers in Durango, Colorado who spent years in the garage solving the same problem you have: how to carry more gear without sacrificing your truck bed. The result is the patented MTMS™ platform — the only no-drill system that turns the dead space beside your bed into organized, accessible storage.
When you buy from STAPLL, you're backed at every step. Every rack is guaranteed to fit your truck or your money back, built from anodized aluminum, powder-coated steel, and stainless hardware to survive the trail, and covered by our lifetime warranty. Real people answer your questions seven days a week, and if your setup is unusual, we'll get on a call and map out the cleanest build with you.
We ride what we build, and we stand behind it for life. That's the STAPLL difference — engineered by people who'd rather be outside, for the ones who feel the same.
The T-Slot Hardware Kit.
Some tonneau covers — Retrax and similar retractables — have their own exterior T-slot track that runs along the outside of the rail, and that track is designed for mounting accessories.
We mount straight into the T-slot. The T-Slot Hardware Kit bolts the Fender Rack into the cover's own track — no drilling, no clamping, and no compromise to the cover.
- Bolts into the track your cover already has — the rack becomes part of the same system.
- No clamping to the bed rail, so the cover's seal and travel are untouched.
- Not interchangeable with the Lift & Seal Kit. A T-slot cover needs this kit; a rail-mounted cover needs the other. Using the wrong one won't work.
