Unique single-use mechanism avoids needlestick injuries and prevents cross-infection. Side firing action provides extra comfort for both patient and professional. Yellow cap "Normal" is for normal skin types and standard tests such as blood glucose monitoring in adults and cholesterol testing. Orange cap "Extra" provides deeper penetration for tougher skin or for larger samples. Purple "Comfort" has reduced penetration for more delicate skin, such as pediatric or geriatric patients.