Unistik 2 Normal Blood Letting Device - Retractable - To sample blood safely, simply and successfully, the Unistik 2 range of single-use safety lancets comprises five versions, offering a variety of needle gauges and penetration depths to meet all your sampling requirements. First, all have the same unique single-use mechanism to avoid needle stick injuries and prevent cross-infection. Second, side firing action to provide extra comfort for both patient and professional. Safety Information: The reuse of this single use device will affect safety, performance and effectiveness, and will expose users to unnecessary risks.