Use these Sensory Evaluators to test sensory levels and obtain objective data for accurate reporting on the status of diminishing or returning sensibility. The unique handle easily opens to a 90º angle for testing. When closed, the Sensory Evaluator can be carried safely in a pocket or carrying case, protecting the filament when not in use. Each handle is marked with corresponding pressure level. Individually calibrated to within a 5% standard deviation to US Patent Standard.