I think the pilot part of these drills is absolutely not worth it. I was trying to find a good deal on Amazon and came across this product. I thought it would be ok but the square tip makes it very difficult to cut bad threads for the spiral coil. On a drill press this would probably be fine since you can work slowly. I'm pretty sure a standard bit would be the way to go for me. I've also drilled through fiberglass and it's still wandered. I no longer get a pilot grade. I'm not a drill expert either, but damn the bit wanted to get stuck on everything.