They drill through wood easily, but they also break easily. Mine fell apart at the base on the second day of use. I'm still using it, but not as long as I'd like. Bad design.
Pros
QUALITY VALUE SET - Countersinks are made in China which allows us to offer a competitive price but JNB Pro requirements, such as the product is better or the same quality as the US. If for any reason you are not satisfied with the product, you will be asked to return or replace the product. Your satisfaction is our goal. Broca Avellanadora Para Madera