Using a wall hole saw involves selecting the appropriate hole saw, preparation, construction steps, and precautions. Here are the specific steps and considerations:

1. Select the Appropriate Hole Saw: Choose a suitable hole saw based on the actual situation. Generally, the size of the tile hole saw should be the same as or close to the diameter of the required hole to avoid affecting the installation.

2. Preparation Work: Before starting construction, it is necessary to prepare. First, prepare the correct safety equipment such as gloves and safety glasses. Secondly, choose the appropriate gear according to the material of the tiles to ensure a better hole-cutting effect. Also, select an appropriate coolant based on the actual situation to avoid damage caused by overheating.

3. Construction Steps:

• Measuring and Marking: Use a protractor to measure the size of the tile and mark the center point of the desired hole location. To ensure accurate hole positioning, it is best to stick a layer of tape on the tile and then mark on the tape.

• Start Drilling: Place the tile on the hole saw and add an appropriate amount of coolant. Note that the coolant should be added when the hole saw is stationary to avoid overflow. Maintain low speed during cutting and avoid excessive pressure to prevent the tile from cracking.

• Tidying and Cleaning: After completing the hole, use tools to clean the hole edge to ensure the subsequent installation goes smoothly. Thoroughly clean the work area.

4. Precautions:

• Wear safety glasses, gloves, and other safety equipment when drilling to avoid injury.

• Secure the tile before drilling and adjust the depth and speed of the hole saw to prevent damaging the tile.

• Apply slow pressure and operate at low speed to stabilize the tile during drilling.

• Add an appropriate amount of coolant during the drilling process to maintain the temperature of the cutting tool.

When using a wall hole saw, especially when drilling tiles, it is crucial to avoid cracking the tiles. This typically involves using the appropriate drill bit, maintaining the proper speed and pressure, and timely use of coolant to reduce heat buildup and potential cracking. Additionally, different types of wall materials (such as concrete, brick walls, etc.) may require different types of drill bits and drilling techniques.