Introduction: Different grasp configurations are used frequently in our daily living activities. In the rehabilitation process occupational therapists use equipment to train hand prehension. The trained grasp configurations, using equipment, are restricted to 4. This is a small number considering that there are 33 different grasp configurations.
Objectives: Design and test adaptations, built-in 3D printing, so diverse the grasp configurations will use equipment to train them.
Methods: Using the grasp taxonomy, the form, and diameter of the objects identified for each grasp configuration by Feix et al. (2026), there were designed adapters for the Graded Pinch equipment, to allow the performance of 5 more grasp configurations during the training of hand grasp strength and coordination. These were tested by 3 populations: occupational therapists (N=20), participants with no hand or arm conditions (N=60), and others with muscle-skeletal conditions that affect the hand directly (N=60). The participants try the adaptations and answer a usability questionnaire.
Results: There was more than 95% agreement in all the answers to the questionnaire. The 3 groups found the adapters very useful and proper for training the grasp configurations proposed. The participants with muscle-skeletal conditions do not identify any discomfort, constrictions, or pain in the use of the adaptations. The occupational therapists suggest pairing them by coloring the pieces that function together, to create some texture so slippery can be avoided, and to create the possibility to have a longer arm until the center of the clip, so the patients could apply more strength.
Conclusion: The Kit composed of different groups of pieces that allow the training of 5 more grasp configurations was validated integrating the suggestions of the occupational therapists and the participants.