now, there are many holes in the market, the hole can be installed on the ordinary electric brick, it is very convenient in the copper, iron, stainless steel and other plates of arbitrary surface opening. It is the most commonly used double metal hole, the metal hole recommend, metal material advice in the use of hard carbide, glass, ceramics and other easy cracking of the material I suggest using the diamond hole, you can achieve more ideal effect.

　　fixed hole is divided into different types, including ordinary type, water type, water type which is commonly used in the hole in the wall, so the work efficiency is relatively high, hole is more beautiful, it looked comfortable, if the opening is not beautiful, not ugly, also can let a place where the wall looked a bit rough, also very torque. The utility model is suitable for being used in aluminum material, steel, wood and plastic, and is a high speed steel hole opener.

　　different materials need to choose different openings, so as to achieve the desired results, it will be more convenient to use.