ONE-CARE OPTI+ Adjustable Safety Lancets offer excellent ergonomics with T-shape main housing, comfortable wings and concaved button for stable grip within the hand and easy activation. ONE-CARE OPTI Safety Lancets feature long and wide safety tab for convenient twist off and pull out, optimized skin contact area of round shape for convenient placement on the test site, low trigger force for convenient activation. Dual-spring mechanism allows for quick and gentle puncture for enhanced comfort. Automatic and reliable retraction helps protect against accidental needlestick injuries. Built-in depth control provides for consistent and accurate sampling results. STEP 1 Twist off the safety cap by a full turn of 360 degree, then pull it out, STEP 2 Press the top push button to activate the device, STEP 3 Collect sample and dispose the safety lancet into sharps container.