Suitable for porcelain glue joints: The metal ball tile finishing tool can be used to remove tile grouting, quickly fill the gap after use, and let the coating fill the tile joint. It can effectively improve the smoothness of the gap between the tiles, improve work efficiency and make work easierDecontamination function: our joint saw is suitable for cleaning various gaps; It can be used to remove unwanted grout, grout, flakes, putty and surface debris. It is easy to use and saves time and effortMaterial: Metal ball joint tools are made of alloy steel, durable and reusable. The outer layer is protected by a blue plastic sleeve for a comfortable and comfortable gripSize: Metal ball diameter Dimensions: 4 mm / 0.16 inch, 6 mm / 0.24 inch, 8mm/0.31inch, 9.5mm/0.37inch, 11mm/0.43inch, 12.7mm/0.5inch, 15.8mm/0.62inch, 19mm /0.75 inch; Casting saw size: handle length 12cm; Blade length: 7cmPackage includes: There are 4 metal ball joint finishing tools and 3 grout saws in the package, and the ball joint finishing tools have 8 sizes