The locking system and the retention battle
After closing the brush and grabbing the item, the user does not apply force to hold the item. Also, after capturing the object, a person can bend the brush in the wrist joint or weaken the shoulder thrust, and manipulate the captured object by rotating and tilting the brush in the wrist joint. The locking system is active and does not require pre-configuration and manipulation of the second hand, which makes it possible to operate in pair amputations.
In other traction prostheses for grasping and holding of the subject is necessary to apply a force to keep the brush bent in the wrist joint, which is very inconvenient and does not allow you to manipulate the item through the wrist joint because when the extension brush is the opening of the fingers, and the subject drops out of the grip.