​Syringes come in two types of connection that attach a hypermetric needle to the end of the syringe: Luer Lock or Luer SlipLuer Lock has a screw type connection that affixes the needle onto the end of the syringe and locks into place. This means that the connection is secure and minimises the risk of removal.Luer Slip syringes are attached by pushing directly onto the syringe tip. If you require any help or advice on choosing the right syringes or needles, please call 01704 553 773 or send an enquiry to Orders@bmsupplies.co.uk