Green Slider Allows a controlled retraction of the entire blade Safe and easy to open, with temporary forward locking to prevent accidental retractions Permanent lock position for disposal Color coded slider easily identifies blade size Ribbed, slip resistant finger grips for a ...Green Slider Allows a controlled retraction of the entire blade Safe and easy to open, with temporary forward locking to prevent accidental retractions Permanent lock position for disposal Color coded slider easily identifies blade size Ribbed, slip resistant finger grips for a secure hold in gloved hand accomodates a variety of hand positions High visibilty red handle denotes a biohazard to ensure proper disposal in sharps container Full blade visibilty at all times to reduce the chance of accidental injury