Just cut off the part you do not want. When developing products there are a number of common handles and actuators that may be readily adapted to a device you are working on.
One example of a common actuator is the handle of a disposable wire grasper. The three loops of the actuator are for the thumb and middle and index fingers, and produce a pushing and retracting action. I have used this actuator for a number of projects. They are simple and inexpensive and are a convenient way to quickly and inexpensively build up a number of devices that require this type of actuator.
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