Patent pending · USPTO provisional · Free on every Kooler service

The K Kap. A free safety cap for your garage door springs.

A plastic outlet cover. For your torsion spring.

A high-visibility plastic cap that snaps over the adjustable, high-torque end of every garage-door torsion spring we touch. It does not contain anything. It is a deliberate, visible warning, so homeowners and DIYers see where the stored energy lives and keep their fingers out of it. Included free on every Kooler service.

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Why we built it

A visible warning, exactly where the stored torque lives.

01
20,000-30,000 garage door injuries a year.

The CPSC tracks tens of thousands of garage-door-related injuries in US emergency rooms every year. A meaningful share of them come from homeowners and DIYers reaching into the torsion-spring system to make an adjustment they didn't know was dangerous. The K Kap exists because the warning the system should have had wasn't there.

02
The adjustable end is where the torque lives.

A standard double-car door torsion spring stores roughly 250 to 400 foot-pounds of energy under tension at the winding-cone end. That is the side a Kraftsman winds and unwinds with bars, not the side a homeowner ever touches. The K Kap snaps over that exact end so the eye sees the hazard before the hand goes near it.

03
Like the plastic outlet cover, for the spring.

Parents put plastic outlet covers on electrical outlets so a kid sees the cover, sees that something is different about that spot on the wall, and doesn't stick their fingers in it. The K Kap is the same idea on the spring system. A visible, deliberate, plastic warning over a part of the door that homeowners and DIYers should never adjust without a trained Kraftsman on the bars.

What it looks like

High-visibility orange. "Danger Zone. Sealed With A K."

The cap is intentionally loud: bright orange, large readable warnings, the Kooler phone on the front. A homeowner glances up at the spring shaft and sees the cap before they see anything else.

K Kap: orange plastic torsion-spring safety/warning cap with 'Danger Zone! Sealed With A K' branding and 'Do Not Touch!' warning. Currently 3D-printed in-house at Kooler.
The K Kap: Kooler-only, USPTO provisional filed March 2026, free on every spring we touch.
K Kap detail: 'Do Not Touch!' warning embossed on the cap face, covering the adjustable winding-cone end of a torsion spring where 250-400 ft-lbs of torque is stored.
"Do Not Touch!" sits over the adjustable winding-cone end, the side where the torque lives.
The fact sheet

What the K Kap is, and what it is not.

Eight straight facts to share with your spouse, your DIY friend, or anyone else who has never heard of the K Kap.

What it is
A plastic safety/warning cap that covers the adjustable winding-cone end of a torsion spring
What it does
Visually warns homeowners and DIYers where the stored torque sits. Keeps fingers out of a high-energy part of the system
What it does not do
It is not containment. It does not hold a failed spring inside the cap. It does not extend spring life. It is a warning, not armor.
Material
Plastic, 3D-printed in-house at Kooler today. Supplier agreement for higher-volume production is pending and will be made public shortly.
Patent
USPTO provisional filed March 31, 2026 by Matt Kuehlhorn, founder of Kooler Garage Doors
Cost to the homeowner
Zero. Free. No add-on charge, no line item. Included on every Kooler service that touches a spring.
When it gets installed
Every time. Spring repair, new-spring install, annual tune-up. If a Kooler Kraftsman is on your spring, a fresh K Kap goes on at the adjustable end before the truck leaves.
Industry availability
Kooler-only. No other garage-door company in the country offers a torsion-spring safety/warning cap today. We expect this to become an industry standard in the near future. Kooler did it first.
How it goes on

Every spring we touch. Every visit. Always free.

If a Kooler Kraftsman touches your torsion spring, whether that is a single-spring repair, a full new-spring install, or an annual Kooler Cares tune-up where we just inspect and lube, a fresh K Kap goes on the adjustable winding-cone end before the truck leaves. Every spring. Every time.

Right now the caps are 3D-printed in-house at Kooler. Yes, our founder's son currently runs the printer. We are working through a supplier agreement for higher-volume production and will share the details publicly when it is in place. The material is plastic on purpose: light, safe, deliberately visible, and easy for a Kraftsman to inspect and replace on every visit.

After install, the cap is visible from inside the garage looking up at the spring shaft. Bright, deliberate, plastic. Sitting right over the part of the system that stores the torque. Glance up, see the cap, remember the rule: that is not a place to put hands.

What it costs

Zero. Always.

The K Kap is free on every Kooler service that touches a torsion spring. No add-on charge. No line item. No upcharge. Same Kraftsman, same visit, same Guarantee that never expires, and a fresh K Kap on every spring before we leave.

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Common questions

Things homeowners ask about the K Kap.

What is the K Kap, in one sentence? +
A high-visibility plastic cap that snaps over the adjustable winding-cone end of a residential garage-door torsion spring so homeowners and DIYers can see where the stored torque lives and keep their fingers out of it, like the plastic outlet covers parents put over electrical outlets.
Is the K Kap a containment system? +
No. The K Kap is a safety/warning cap, not a containment system. It does not catch or hold a spring if it fails. It is a visual warning over the adjustable, high-torque end of the spring so homeowners and DIYers know not to put hands in that spot. Think outlet cover, not bulletproof glass.
Why does this matter? +
Because 20,000 to 30,000 garage-door injuries happen in the United States every year, and a real portion of them come from homeowners attempting to make adjustments on torsion-spring systems they did not know were dangerous. The torsion spring stores hundreds of foot-pounds of energy at the winding-cone end. The K Kap puts a literal visible warning right where the danger sits.
What is it made of? +
Plastic. Right now they are 3D-printed in-house at Kooler. Yes, the founder's son currently runs the printer. A supplier agreement for higher-volume production is in progress and will be made public once it's signed. Plastic is the right material on purpose: a visual warning that is light, safe, easy to inspect, and easy to replace on every service.
What does it cost? +
Nothing. The K Kap is free. There is no add-on charge, no line item, no upcharge. If a Kooler Kraftsman touches your torsion spring on a repair, a new-spring install, or an annual tune-up, a fresh K Kap goes on at the adjustable end before they leave. Always.
Does it go on every spring? +
Yes. Every spring we touch. New-spring install: K Kap goes on. Single-spring repair: K Kap goes on. Annual Kooler Cares tune-up where we just inspect and lube: a fresh K Kap goes on. It's a visual reminder, refreshed on every visit, of where the torque sits and where hands don't belong.
Why does Kooler offer this when no other installer does? +
Because Matt Kuehlhorn, founder of Kooler, built it. After years of seeing what happens when a homeowner reaches into the wrong part of a torsion-spring system, he designed a deliberately visible plastic cap, filed the USPTO provisional patent in March 2026, and made it standard on every Kooler service. We expect this to become an industry standard in the near future. Kooler did it first.
Will the K Kap stop my spring from breaking? +
No. A K Kap does not extend the life of the spring or prevent it from failing. Springs break. That is what springs do, sooner or later. The K Kap is a visible warning over the high-torque end of the spring while the spring is in use. The Kraftsman's tune-up schedule extends spring life. The K Kap is there so you know which part of the system not to touch in the meantime.
Is the K Kap visible after install? +
Yes. That is the point. It mounts on the adjustable winding-cone end of each torsion spring, visible from inside the garage looking up at the spring shaft. Bright, deliberate, plastic. A homeowner walking into the garage should be able to glance up and see exactly where the high-torque end of the system is. That is the warning doing its job.
We Got You

A fresh K Kap on every spring we touch.

Book a Kraftsman for a repair, a new-spring install, or an annual tune-up. Your K Kap is included. No diagnostic fee, no obligation, no extra charge for the safety/warning cap that nobody else in the industry is doing yet.

Book online Call 970-660-3456