HA22-45 Extremely tough alloys and advanced design make these Hercules impact bits outlast the others. Packed in a jobsite-tough case with easy-access bit storage, these drivers are capable of driving over 1500 screws before showing signs of wear - up to 10x life! This insert bit set comes with the Hercules magnetic drive guide and bit holder for fast bit changes without dropping or wobbling. Exclusive design gives you the best fit in fasteners to reduce stripping. Advanced design for max shock absorbing, making these the preferred bits for use with Hercules drill/drivers and impact drivers.