Features: Humanization Design: Unique normally open function--With a normally open switch, you can use this function when kids is not at home, so you do not need the magnetic key to open the cabinet/drawer every time; Sticky Base for Magnetic Key--convenient for you to place the little key on a fixed position or on the wall to avoid missing, more easier to use and humanized. Fit on All Surface: The universal design of these magnetic locks lets them be used on any fairly typical cupboard or drawer. It works on any smooth surface that within 35mm / 1.4" thick. This simple set will cover all your cupboard safety needs. It comes with bonus 3m sticker, convenient for you to reuse the latches and locks. Specification: Type: Child Safety Magnetic Lock Material: ABS Quantity : 1set (4 Locks + 1 Key/8 Locks + 2 Key) Color: White Lock Size: 3.8 x 3.4 x 3.9cm / 1.5 x 1.3 x 1.5inch Key Size: 3.6 x 3.6 x 2.3cm / 1.4 x 1.4 x 0.9inch Installation tips: Please clean and dry the surface. 24 hours before the first time you use the maximum adhesive. Notice: Please stop using it if it is damaged This product can not take care of the baby instead of adults. The lock is suitable for thickness less than 35mm. When installing, do not touch the sticker or double use, otherwise it will make the sticker weaker. Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid.