Invacare Bullseye Safety Lancet single use retractable lancet with a one-of-a-kind "Color Indicator" that disappears after the device has been used and eliminates potential for cross contamination. Each lancet has been individually wrapped for maximum sterility. The lancet also offers a locking safety cap, which ensures safe disposal. Offers patients and health care professionals unrivaled safety and security. Ergonomical design makes the lancet easy to handle and the quick spring action increases patient comfort. Tri-Beveled Needle. Easy to use, pre-cocked and ready to use. Two simple steps: remove cap and fire.