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Introducing the ATK HydraPro

The evolution of the All-Terrain Knee; the ATK HydraPro is a waterproof, hydraulic knee joint, designed to meet the daily physical demands of active amputees.


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Narrowing the accessibility gap.

Our Clinical Specialist, Nick Vogel, CP, illustrates how the All-Terrain Knee Collection helps to fill the largely unmet need for economical, yet high-performing, prosthetic devices. Read More

Clinical Trial Results

The All-Terrain Knee has been clinically tested in 10 countries around the world. 95% of users preferred the All-Terrain Knee for daily use.

Patients expended 40% less energy.

Patients expended 40% less energy on average when using the All-Terrain Knee. View Study 

Patients fall down less.

Reported falls decreased from 1 per day to 1 per month when using the All-Terrain Knee. View Study

Meet Brian

Brian is an athletic bilateral above-knee amputee from Florida, who started using the All-Terrain Knee when he was just 12 years old.

Read His Story

“Autolock Technology is good for carrying groceries and doing work in the backyard."

Dan, Community Advocate & AKA

"I can rock climb now, play more sports, walk better, and don’t fall as much."

Brian, Bilateral AKA

“If safety and stability is your paramount goal, this is the knee for you.”

Pete, Prosthetist & AKA

LegWorks Mobility Project

LegWorks is a for-profit social enterprise: our mission is to help people walk with confidence. 


Our Guarantee

We offer a 24-month manufacturer's warranty. Want to try the All-Terrain Knee? Ask about our risk-free 30-day loaner program.