871/4 TORQ-SET® Mplus bits, 5/16", x 50 mmHigh quality bits for TORQ-SET® screws. The stronger flanks - when compared with the conventional TORQ-SET® profile - result in 70% more breaking torque and thereby enhanced durability whilst at the same time providing a perfect fit in the screw head. hexagon, suitable for holders as per DIN ISO 1173-F 6.3.