Inclusion Criteria:  Subject has primary, chronic (> 6 weeks) scapholunate instability diagnosed by X-ray, dynamic X-ray, MRI/MRI arthrogram and/or arthroscopy Subject is a suitable candidate for RASL repair with the ACUMED® Scapholunate Repair System Subject is willing and able to participate in required follow-up visits and can complete study activities. Subject provides informed consent  Exclusion Criteria:  Subject has scapholunate advanced collapse wrist arthritis above grade I (styloid only)  Subject has conditions that would eliminate or tend to eliminate adequate implant support:  Blood supply limitations; Insufficient quantity or quality of bone support (osteoporosis, metabolic disorders which may impair bone formation, tumor, osteomalacia, etc.). Subject has mental or neurological conditions which impair their ability or willingness to restrict activities that may put the affected limb at risk. Subject has physical conditions that tend to place extreme loads on the implants (Charcot joints, muscle deficiencies etc.). Subject has neuromuscular dysfunctions (paralysis, myolysis, etc.) which could cause instability of the wrist after surgery Subject has an emotional or neurological condition that would pre-empt their ability or willingness to participate in the study Subject has an active infection - systemic or at the site of intended surgery Subject has a known allergy to any component of the devices used in the study Subject is pregnant or breast feeding Subject is entered in another investigational drug, biologic, or device study within 30 days of active study participation