XZN "Super Short" Socket Bit Set, 8Pc The OTC 5942 includes sizes 4, 5, 6, 8 are 20mm in length and have 1/4 internal square drive with a 7/16 external hex drive, and also includes sizes 10, 12, 14 & 16 which are 25mm in length and have 3/8 internal square drive and 5/8 external hex drive. . Rugged design features one piece steel construction for product durability. . The OTC 5942 - Super Short XZN socket bits are ideal for door hardware R&R on VW and Audi. . XZN (Triple Square) fastener profiles are common to many European automobiles, but also found elsewhere.. The short profile makes the OTC 5942 a popular choice for body service professionals.. Proper tools are critical for R&R of vehicle components. . Many OE's choose specialty fastener profiles for improvements in the manufacturing process - for engagement with tool fixtures, quality torque specifications, reduction in fastener damage, and of course - cost. . Service professionals must have the correct tools to repair and replace vehicle components having these profiles. . The OTC 5942 is an excellent solution for XZN fasteners placed in tight quarters. . The shortened design allows clearance for technicians to use existing ratchets and wrenches. . Stored on a socket rail for easy identification on the hook or in the drawer! 5942