These drawers are specifically designed for the Ender 3 Max. They are likely not compatible with any other Ender 3 series printers, so please make sure you are using the Max version or have upgraded and expanded your Ender 3. Since they are not equipped with limit switches, the drawers can be fully pulled out; however, for the small tools I store in them, this design is very convenient for retrieval, allowing easy access to every corner.