AutoShield Duo Insulin Pen Needles safely delivers everything you need and want: the highest level of protection you can get, ease of use and the flexibility to work with all the pens at your facility. It’s the only diabetes insulin pen needle you need. Needle eliminates “pinch” technique, which can increase the risk of a of needlestick injury. It is the only pen needle that automatically covers the front and back of needles, eliminating exposure after use.