1.Copper tube brushes: copper tube brushes resist to wear, tear, impacts and corrosion, while preventing the bristles from becoming flat so you can keep things clean for years; Comfortable grip with a light weight and humanized design give the brush a maximum grip to prevent slippage 2.Contents: each set includes 2 pieces pipe cleaning and 2 pieces tube reamers, which are applied for removing burrs from pipe edges, and enough can meet your needs or replacement 3.4In1 pipe cleaner tool: 4in1 design features 4 convenient brush shapes suited for quick and easy interior and exterior cleaning of pipes; A versatile handheld tool easily scours tubes measuring 1/2 inch, 5/8 inch, 3/4 inch, and 7/8 inch; A common size makes this tool kit proper for your home 4.Durable material and size: the main body of the pipe reamer is made of plastic, which is strong and durable, and the internal deburring blade is made of hardened Metal, which can provide you with longlasting use; The reamer is suitable for the diameter of pipes from 3/16 inch to 11/2 inch, and it can be applied to pipes of various materials such as PVC, PPR, copper, aluminum, brass and so on