The world’s first multi-articulated body-powered hand.
Voted ‘Best New Product’ by Clinicians
See GEM in real life.
From work tasks to everyday routines, watch how users are putting GEM to use in the moments that matter most.
GEM Lock
Lowest force to grip.
Zero force to hold.
GEM Lock secures the GEM hand in position once a grasp is established, so users can maintain their hold without continuously applying harness tension.
Less effort
Reduce the need to continuously maintain harness tension.
Lower fatigue
Relax after securing a grasp during longer holding tasks.
Secure holding
Keep the hand in position until you are ready to release it.
Technology you can trust. Built to last.
Strength you can depend on — waterproof, durable, and ready for real life. When reliability meets effortless function, your prosthetic becomes invisible.
Pressure you can feel
Waterproof design
Instant response
Durability redefined
Elegance in engineering. Strength in design.
Pinch Grip
Delicate precision made easy — from zipping a jacket to picking up a key.
Power Grip
Lift, carry, and move with strength you can trust — all day, every day.
Lateral Grip
Hold a phone, carry a book, or grasp a steering wheel with natural stability.
Trusted by users. Backed by clinicians.
Alan McDougall
Clinic Manager of Proactive Prosthetics
"The Metacarpal GEM has uniquely brought the benefits of multi-articulating hands to the mechanical prosthetic hand. I believe this will benefit many patients, both new and established.”
Tony Guitierrez
Clinical Director, Bionic Prosthetics and Orthotics Group
“The body-powered multiarticulating hand is a welcome innovation in the space and has already positively impacted two of our patient outcomes and functional ability”
Jim
GEM user & practicing prosthetist
“To achieve function of a hand, reliably and in an attractive package is asking a lot. The GEM hand is the perfect answer”
Garet
GEM user
“After years of fatigue and discomfort with myoelectric devices, this just works when I need it to. I can wear it all day, and it’s comfortable.”
Three generations of prosthetics. One clear step forward.
Instead of asking you to adapt, Metacarpal adapts to you.
Metacarpal GEM
| Myo electric hand
| Body powered hook
| ||
| Function | Variety of Grips | ✓ | ✓ | x |
| Conformable Grasp | ✓ | ✓ | x | |
| Proprioception | ✓ | x | ✓ | |
| Durability | Robust | ✓ | x | ✓ |
| Waterproof | ✓ | x | ✓ | |
| Dependability | Reliable | ✓ | x | ✓ |
| No Charging | ✓ | x | ✓ | |
| Appealing aesthetics | ✓ | ✓ | x |
Flipping the script on prosthetics.
At Metacarpal, our vision is to create a future where upper-limb prosthetics are trusted, embraced, and never left behind. Too many prosthetic users are let down by devices that feel alien, fragile, or hard to control. We’re here to change that—with technology that works with you, feels like it belongs, and keeps up with real life. This is prosthetics, redefined.
