Features and Benefits: T15 Torx Dual Drive Bit; 7/16" Drive; Precision tip profile manufacture for positive and precise fastener engagement; Titanium Nitride coating for added strength and wear resistance; Unique Dual Drive design allows the bit to be driven by a Ratchet; Socket Spinner; Box or Open End Wrench; Compatible with 1/4" Square Drives and 7/16" Hex Drives;