Step 1
Tear off three 2-by-2-inch square strips of masking or duct tape.
Step 2
Press all three pieces of tape on top of each other on the location on the outer surface of the Weber grill where you intend to drill the hole.
Step 3
Draw a small dot on the top piece of tape with a permanent marker in the exact spot you want the hole.
Step 4
Secure the 3/8-inch high-speed steel drill bit into the drill and line the tip up an inch away from the permanent marker guide dot.
Step 5
Rev the drill at full speed as you slowly press the bit into the dot on the tape and through the Weber grill.
Step 6
Change out the 3/8-inch bit for other high-speed steel bits that are increasingly larger if you need to make a larger hole. Drill through in the same fashion, always revving the drill to high as you make first contact with the tape.
Step 7
Peel away the tape and wipe down the surrounding area with a soft cloth when the hole is large enough for your project's purposes.