I was drilling scrap out of a blind hole and the auger on one of the auger bits broke in the third hole I drilled. And it's on a pine tree! I mean, for money and people on a budget this might work, but I wouldn't recommend it to a frequent user. Drilling a few holes in the frame to get through the electrics etc might still work, but I've had better performance with auger bits I bought from a vintage shop in combination with a clamp .