These Norkse Tools NIBBI113 T-20 x 2" long Torx driver tips feature a tight tolerance and 6-point lobe that eliminates cam-out problems thus allowing you to remove the screw at a later date if required. This driver bit is manufactured with an innovatively designed flex tech torsion zone that absorbs high torque stress and reduces bit fracture.Innovatively designed flex tech torsion zone absorbs high torque stress and reduces bit fracture Proprietary tool steel and heat treat process for maximum strength and durability Hardened S2 Modified Impact Resistant Steel for extended bit life CNC milled magnetic tips for supreme grip Impact.