Twist Top Lancets for Blood Glucose Monitoring - Refill your Blood Glucose Monitoring System with these Twist Top Lancets. Use these lancets for glucose system as they are or with our Lancing Device (sold separately). Our lancets are manufactured with the greatest degree of precision. The tri-beveled needle for glucose monitoring system enhances user comfort and reduces tissue damage. Packaged 100 to a box, you'll be sure to always have some on hand.