To make slow and steady dispensing comfortable, these syringes have a ring grip to give your fingers a secure hold. The ring grip also makes them easy to fill with one hand because you can raise the plunger with your thumb. They’re plastic, so they resist shattering and are suitable for use with a variety of liquids. However, they’re not as scratch resistant as glass or stainless steel syringes and are less precise than glass ones. Since they come sterilized, they’re ready to use in clean rooms. Twist a luer lock needle into place to start dispensing.