"Handles delicate venous blood draws, utilizing a safety feature activated with a simple one- or two- handed technique. Available with or without pre-attached Saf-T Holder® device. Available with 21g, 23g, 25g needles and 6\" and 12\" tubing lengths. Available with Saf-T Holder® devices, which come with the back-end needle and Luer permanently attached to the holder to reduce potential exposures and holder re-use, compliant with OSHA directives. Clamp minimizes blood leakage from tubing upon disposal."