Needle Holder is designed to protect blood collection personnel from accidental needle sticks. The safety needle holder features a plastic shield that is used to cover the exposed needle after the collection of blood. An audible In.clickIn. indicates the needle is secured and ready for disposal. Easy to use Complies with OSHA directives by preventing removal of needle and re-use of holder. Fits both 13mm and 16mm blood collection tubes and all common needle units.