Abstract: A tool to protect professionals who use hypodermic needles in their work from inadvertent punctures to themselves by contaminated needles comprising a sliding member (16) and a stationary member (28). The first step in using this tool is to retract sliding member (16) by compressing protruding member (24 left and 24 right) together thereby reducing the overall width of (24). (24) is then manipulated into channel (26) and retracted to the point to where leaf (18) can be depressed. The user then allows spring (30) to protract sliding member (16), beveled edge (17) of leaf (18) will then catch in groove (19), the purpose being to expose the tip (41) of tube (42) while maintaining sliding member (16) in an unlocked position. The user can then puncture the outer dermis or layer of the subject without meeting obstruction from sliding member (16).