n-ABLER Pro Rollerballn ABLER Pro Rollerball: Precision Rollerball for Users with Motor Skill Difficulties Its symmetrical design supports both left and right handed use, while the integrated wrist rest promotes a comfortable work posture, making it ideal for extended computer sessions. The n ABLER Pro Rollerball is particularly beneficial for users of all ages who experience involuntary muscle spasms, tremors, or movement impairments. Key Features: Rugged and Ergonomic