I was building an 800 square foot patio and was disappointed with the free torx bits that came with the screws. Each of them turned 5-10 screws before becoming so damaged that it got stuck in the screws and broke out of the mounts in my drill and impact driver. I found them and have had good luck with Bosch bits in the past so I bought them. Wow what a difference! We screwed in all the screws for the terrace - approx. 5000 pieces - with only two bits! And the only reason we used 2 is because 2 different drivers were used at the same time. I strongly suspect that one bit would be enough for 5000 screws. From now on it's only Bosch bits for me.