Witte Bits combine optimal torque transmission & endurance especially when used with specially hardened screws. A special hardening process & exact fitting are the conditions for these results. Cards of 3 Double Ended. Sizes 1 of each Phillips No. 1 Phillips No. 2 Phillips No. 3 Pozidriv No. 1 Pozidriv No. 2 Pozidriv No. 3.