single-handed, passive activation hands remain behind the sharp integrated safety mechanismprevents recapping and needle removal remains safe through disposal easy to use. 100/Bx 8Bx/Cs #15221-1/2mL 30Gx1/2" #10211-1mL 29Gx1/2" #10271-30gx5/16 Latex Free UNSPSC#42142609 NJCore