I have used Makita gold, Milwaukee Shockwave, and the Dewalt bits. I have to say for an impact driver 1. Makita gold bits. 2. Dewalt bits. 3. Milwaukee shockwave. I hate the shockwave bits. I have twisted almost all of the bits that came in my large set. Dewalts seem to work good. Makita's are by far the best. they last the longest and the coating does not ware off after time and use like the shockwave bits.