The hand skeleton (or finger skeleton) refers to the internal bone structure embedded within the sex doll’s palm and fingers, designed to support and control hand movements. Currently, Sex Doll finger joints on the market are primarily divided into two major categories: “Wired Fingers” and “Articulated Fingers”. Next, how to choose the right finger skeleton for your doll?
Wired Fingers
Hand Palm with Wrist Joint
Articulated Fingers
1. Wired Fingers
This type of skeleton does not feature independent joints. Instead, each finger contains a metal wire skeleton (usually copper, or a strand of stainless steel wires wrapped in fabric). It is compatible with all series.
The reason this design has remained irreplaceable for years is that it lacks the joint limitations found in human fingers; the fingers can bend into smooth arcs and assume virtually any shape. However, the disadvantages are also clear: frequent manipulation and twisting can cause the internal metal wire to break or leave permanent kinks, making it difficult to repeatedly achieve specific poses.
Currently, most TPE Sex Dolls on the market come with Wired Fingers as the default factory standard. This is a recommended choice for consumers who are on a budget or are less concerned with the hyper-realism of the fingers.
2. Articulated Fingers Skeletons
Video Demonstration of XTDoll Articulated Fingers
These are the first-generation bionic finger skeletons, suitable for all series. Although this is an early design, it remains practical and reliable to this day. Its key features include:
- Bionic Phalanx Design: Modeled after real human hand bones, this design features an internal structure similar to human fingers, resulting in movements that are close to reality.
- Movable Joints: When bending the fingers, they move naturally like a real hand. This allows for more realistic and natural hand postures and provides a wide variety of posing options to meet most requirements.
This finger joint option is currently the default factory standard for Silicone Sex Dolls. It is primarily recommended for photographers, users who prefer gentle finger manipulation, and those who prioritize realistic hand movements.
Additionally, some Sex Doll manufacturers have upgraded and modified the standard “Articulated Fingers” to offer unique, proprietary upgraded versions. For example:
2.1 Ultra-Flex Fingers
The brand-new hand skeleton design that ensures the finger skeleton maintains its initial stability and sensitivity over the long term without loosening or deforming. This is achieved by “adjusting and reinforcing the joint structure” and “utilizing all-new anti-fatigue materials”.
Supported Brands: FunWest Doll, SE Doll
Video Demonstration of FunWest Ultra-Flex Fingers
Video Demonstration of SEDoll Ultra-Flex Fingers
2.2 Grace Joint Fingers
Irontech Doll’s latest bionic finger skeleton, offering extremely high flexibility. It is currently used in the Oriental Series and has the following features and advantages:
- Bionic Finger Design: Modeled after real human bone structure, providing finger shapes and movements close to reality.
- 23 Movable Joints: Significantly improves finger flexibility and range of motion.
- Movable Thumb Base Joint: Supports more natural hand movements, such as the “V-sign” gesture and gripping actions.
- Reverse Bending Function: Each finger can bend backward toward the dorsum like a real human finger.
- Anti-Puncture Fingertips: The fingertips are wrapped in soft material to prevent the skeleton from piercing the silicone/TPE surface.
Video Demonstration of Irontech Doll Grace Joint Fingers
2.3 OK Version – XTDoll 2.0 Jointed Finger
XTDoll‘s latest bionic finger skeleton, it’s an upgrade of the 1.0 ordinary finger bones. The number of 2.0 joint finger has been increased, allowing for more poses, making them more suitable for players who like to take photos. It can be used in conjunction with XTDoll’s Anti-puncture fingers techniques for even better results.
Video Demonstration of XT Doll 2.0 Jointed Fingers
2.4 Anti-Puncture Fingers
XTDoll’s Anti-puncture fingers can completely solve the common problem of finger puncture in the industry. Based on the original hard finger material, new materials are used and the structure of the joint phalanges is changed to better protect objects such as thorns.
Video Demonstration of XT Doll Anti-Puncture Fingers
Video Demonstration of XT Doll Anti-Puncture Fingers
2.5 Ball-Jointed Hand Skeleton
WM Doll announced the latest ball-jointed hand skeleton – the 3rd generation of articulated hand skeleton. The articulated hand skeleton can mimic the movements and positions of a human hand, especially the upgrade one is more lifelike and practical. The new generation’s design of ball bearings and a system based on spring tension makes the fingers easily be moved into the required position.
Supported Brands: WMDoll, Irontech Doll, Jinsan Doll, JK Doll, AngelKiss Doll, Starpery
Video Demonstration of WMDoll Ball-Jointed Hand Skeleton
Video Demonstration of Irontech Doll Ball-Jointed Hand Skeleton
2.6 Durable Flexible Fingers
JiuSheng Doll proprietary finger skeleton called DFF, which stands for Durable Flexible Fingers. This type is only available for silicone bodies. The DFF finger skeleton is characterized by its high flexibility, allowing for a wide range of finger movements, and is also more durable and less prone to punctures.
Video Demonstration of JiuSheng Doll Durable Flexible Fingers
3. What Makes a Great Hand Skeleton?
An excellent hand skeleton should possess the following characteristics:
- High Flexibility: Greater flexibility allows for a wider range of movements and poses.
- Superior Anti-Poke Performance: It must prevent the finger bones from piercing the doll’s skin, particularly during positions like doggy style or other poses where the hands support weight against the ground.
- Smooth Operation: The joints should bend easily and smoothly while maintaining the pose firmly, without drooping or automatically springing back.
- Sturdy and Durable: The structure must be stable and resistant to loosening, detaching, or deformation.
We hope “The Complete Buying Guide to Sex Doll Hand Skeletons” helps you select the finger skeleton that best suits your needs.





