These products do not contain Natural Rubber Latex. No Solid Surface Required. Simple Finger Stroke Activation. Protective arm keeps fingers behind the needle. One-Handed Activation. An audible “click” as well as tactile feel and a visual indicator confirm safety mechanism engagement. Needle remains locked inside activated cover. Fits any brand syringe. Safety shield can be pushed back comparative to the needle, allowing a clear view of the injection site. 100/bx.