1,APPLICABLE SIZE: The waterproof and leakproof interface of the special rubber pad is tight, the diameter of the lid is 30‑40mm, and the height of the bottle is not restricted2,WIDELY USED: Suitable for all kinds of plastic bottles, glass bottles, laboratory test tube bottles, centrifuge bottles, medicine bottles and other round bottle caps can be used3,STRONG AND VERSATILE: The product is made of excellent metal and rubber materials, suitable for a variety of sizes of bottle caps, possess good heat resistance, high mechanical strength and not easy to age4,EASY AND PORTABLE: Easy to carry and operate, can be easily used to tighten, loosen or rotate various screw caps5,NON DESTRUCTIVE OR WEAR: With adjustable clutch, can effectively avoid cap damage, reduce the wear inside the plug Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.