Sterile single-use safety lancets Securlancets unik are sterile single-use safety lancets used to perform finger pricks on adults and children in order to collect micro-samples of capillary blood. Capillary blood sampling is a routine procedure for healthcare professionals. It is important for this process to be safe and easy, with as little discomfort as possible for the patient. Securlancets unik are available in two sizes for different blood requirements and skin types: