Includes leading brand Magna screwdriver bits which are well-known within the industry for their durable high quality. PH2 driver bits can be used with all of the fabrication screws, bay-pole screws and drywall screws that we stock. The extra hard range is available in 25mm, 50mm, 70mm and 89 mm lengths. PZ2 driver bits can be used for both our singlethread and twinthread csk pozi woodscrews, and are available in 25mm and 50mm lengths.