TSK Lab Made in Japan Steriject Needles for minimum injection site discomfort. These you can also use for IM cerebrolysin or IM NAD injections with luer lock syringes. Example use your syringe spike and draw out 1ml of nad+ in a luer lock syringe attach this needle administer IM. If you try and draw with this needle your going to be waiting awhile so use your multidose spikes to your advantage if making multiple shots. If none of this makes sense to you don’t buy this product. PLEASE NOTE THESE ARE NEEDLES ONLY!