Double-ended lancet unit for a lancet device. The unit includes a lancet body having a first end and a second end and being sized and configured to frictionally engage with a holding member of the lancet device. A first lancet needle projects from the first end and a second lancet needle projects from the second end and/or a lancet needle member has oppositely arranged pointed ends and is movably mounted to the lancet body. The body is made of a material different from that of the first and second needles or the pointed ends. First and second removable caps are respectively removably connected to the first and second ends. At least one of the first and second removable caps are re-installable on one of the first and second ends of the double-ended lancet unit. The unit is installable on the lancet device and each of the first and second needles or the pointed ends is structured and arranged to prick a users skin to obtain a blood sample and is not usable for fluid injection.
