The Battery Holder for 18V Battery and very easy to use. They work well for hanging your batteries in an organized way on a wall or under a shelf. Your batteries 'click' in place using the batteries existing locking mechanism can hold batteries solid and are removed just with one click of the batteries release button. Once the battery has been locked safely in the dock, it 't fall out even while traveling. This Battery Storage Organizers are specially designed to be used in workshops, under shelves, or fitted to a truck panels tool box. Color coded to match your tools, perfectly space out your batteries. You could adjust the battery type and place position according to your needs. Made of strong plastic, super durable. The battery holder has countersunk head screw holes can be installed at any angle, or placed under the shelf. Material: plastic colour: red Package Contents: 10 x Holder 20 x Screws Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.