Ltulgtr ltligtthe 66fit twist and flex resistance bar has been specifically designed to improve grip strength and upper extremity functionltligtr ltligtflexible durable resistance bar to help strengthen hand wrist forearm and finger musclesltligtr ltligtavailable in three progressive resistance strengths to match user capabilityltligtr ltligtridged surface for enhanced grip during use lightweight portable easy to storeltligtr ltligtproven eff