Make of steel, this tool ensuring durability and stability for long terms use Easy to use: the tool is designed to allow quick and easy Its intuitively design allows users to perform tasks efficiently, reducing the time and effort required for adjustments Great for a wide ranges of applications, from the maintenance of window and door fittings to other precisions work Equipped with a 4mm hexagonal socket and TX15 wrench, this curved inside hexagonal wrench allows for precise and stable adjustments of window and balcony doors, Manufacturer: JUYAXIN