Seeed Studio’s Amazing Hand is an open-source, 3D-printable robotic hand kit with eight degrees of freedom (8-DOF), designed for developers working on robotics control and hardware experimentation. It integrates all actuators directly in the hand itself, making it suitable for robotics projects, education, prototyping, and integration into systems like Reachy2 or custom robotic arms.
The hand uses eight Feetech SCS0009 servos arranged in a parallel linkage, with all actuators housed in the palm to keep the unit compact and lightweight at around 400 grams. Each finger offers two-axis motion for flexion, extension, and limited abduction via differential servo control. Its structure is fully 3D-printable, combining rigid internal frames with flexible TPU shells for robotics prototyping, manipulation research, and custom hand design studies.
Amazing Hand specifications
- Supported Controllers – Raspberry Pi, NVIDIA Jetson, and microcontrollers (MCUs)
- Degrees of Freedom – 8
- Servo
- 8x Feetech SCS0009 bus servos (2 servos per finger × 4 fingers)
- Rated torque – 1.89 kg·cm
- Rated voltage – 5V
- Rated current – 300 mA
- Actuation
- Parallel linkage mechanism with 2× SCS0009 servos per finger
- Flexion/extension + abduction/adduction through differential servo movement
- Host Communication – UART
- Misc – Dedicated controller board for communicating with the hand
- Power – External 5V / 2A DC supply through he control board (USB power insufficient)
- Dimensions
- Overall height – 195 mm
- Palm width – 105 mm
- Palm depth (front to back) – 120 mm
- Finger reach (fully extended) – ≈180 mm
- Finger flexion range
- First joint – ~80°
- Second joint – ~86°
- Finger lateral (side) movement – –20° to +20° abduction range
- Finger alignment angles – Outer fingers angled ~6° and ~13.5° inward for natural curvature
- Wrist angle / mounting tilt – 20° (as shown in side view)
- Operating Temperature – 0°C to 40°C
- Weight – ~400 grams (without servos)
- Design – Fully 3D-printable design with rigid internal frames and flexible TPU shells
The Python and Arduino software stacks for the Amazing Hand are fully open-source, with all control scripts and libraries available on the relevant GitHub repository. With Python, you can run the hand directly from a PC or Raspberry Pi via a serial bus driver, with ready-made demos for gesture sequences, finger-level diagnostics, and calibration routines. Arduino support is available through the SCServo library for real-time control and hardware-level servo commands. Other features, including strain-gauge input via XIAO ESP32-S3 and MediaPipe-based hand-tracking over WebSocket, are also included for developers to experiment with data-glove control, AI-based tracking, or ROS-compatible pipelines without modifying the core firmware. More information is available on the wiki.
Other software-related features include teleoperation via both strain-gauge glove control and camera-based hand-posture estimation for real-time, one-to-one mapping of human hand motion to the robot. The platform also supports joint-angle logging, synchronized visual data capture, and full task-demonstration recording for AI and robotics training. Additionally, it outputs real-time streaming of servo telemetry data like position, load, and temperature that enable advanced processing, monitoring, and data visualization on a host system.
Compared to earlier robotic arms we covered—like the SO-ARM101, Waveshare RoArm-M3-Pro and RoArm-M3-S, and the Yahboom DOFBOT 6 DoF AI Vision arm, which are full robotic arms designed for general manipulation—the Amazing Hand focuses only on the hand itself. Those products offer multi-axis arm movement and higher-torque servos, whereas the Amazing Hand provides detailed finger control, built-in differential motion, and better support for teleoperation, joint-angle logging, and visual data capture. This makes it more suitable for grasping experiments, AI training, and fine-motion research rather than full-arm positioning tasks.
The Amazing Hand is available on the Seeed Studio store for $89 in both left- and right-hand versions. Each kit includes the full 3D-printed structural set, eight Feetech SCS0009 servos, a XIAO-compatible servo driver board, linkage rods, pins, fasteners, a power adapter, cables, and basic assembly tools. The kit may eventually appear on the Seeed Studio AliExpress store, but right now, onlythe SCS0009 servos are sold there.
Debashis Das is a technical content writer and embedded engineer with over five years of experience in the industry. With expertise in Embedded C, PCB Design, and SEO optimization, he effectively blends difficult technical topics with clear communication
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