Function: Provide customers with a better experience and feelings and ensure product safety. Applicability: Suitable for single hook, double hook and price tag hook. The stop lock can be installed on a security indicator hook with a diameter of 4.5 mm to 5.9 mm. Easy to install: The lock hook can be installed without tools. Easy to use, good quality and . size: hole: 6 mm Material: plastic color: red Package Contents: 200 x Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.