1. Durability The wheel body is made of nylon material and has relatively strong compression resistance. It is paired with a zinc alloy bracket, which is light and flexible, and the rolling is relatively smooth. 2. Braking Function When you pull the "LOCK" switch, the caster wheels can be fixed; when you pull the "FREE" switch, the caster wheels can rotate 360 degrees. 3. Suitable for All Floors The wheels are less likely to scratch any surface or leave marks, and have a relatively good mute effect when rolling. These caster wheels are quite suitable for office and household furniture in shared apartments/offices. 4. Wide Range of Application Scenarios These caster wheels are suitable for small equipment and furniture, such as coffee tables, plant stands, bookshelves, shoe boxes, toy boxes, shopping carts, workbenches, etc. 5. Notes If there are any issues with the product quality or you are unsure about the installation, please contact us. We will try our best to provide you with assistance.