Review on 🛠️ AUTOTOOLHOME Combo Set: 10-32NC, 10-24NC, 12-24NC by Joshua Morales

They are obviously designed for drilling and tapping thin metal such as electrical boxes where you only need to tap two or three threads because the metal is thin. After drilling the hole, start the drill as slowly as possible when driving the tap with a drill or impact driver. Coolant, adhesive liquid or cutting wax will help. These drill bits are cheaper than buying numbered drill bits, so I drill with a drill bit and then use the same set of drill bits in the screwdriver handle to cut the hole because I can feel it and slide it in and out to clear the shavings. They work well in electrical boxes and similar applications and are particularly useful for sealing pre-drilled holes sometimes found in electrical boxes.