About Park Tool Quick Change Bit Driver Set (QTH-1)The QTH-1 is an ergonomic T-handled bit driver equipped with eight common bits to fit a wide variety of fasteners and fittings found on bicycles. The magnetic “quick-change" handle allows for one-handed operation and makes changing bits quick and easy. The bit holder can be magnetically attached to any magnetic surface such as a repair stand or tool box, or can be permanently mounted to any wall or tool board. The QTH-1 is a professional-grade tool built to withstand the rigors of daily shop use, and is fully rebuildable. Features Includes the following 1/4" hex drive bits: 2, 2.5, 3, 4, 5 & 6 mm hex T25 Torx®-compatible #2 Philips cross tip Bit holder includes empty spaces for 2 extra bits About Park ToolPark Tool are the world's largest bicycle tool manufacturer. Located in St. Paul Minnesota they have been designing and manufacturing bicycle specific tools since 1963. Their dedication to quality and innovation have gained them the reputation for producing the best bicycle tools in the world.