1 x SabreCut Revolution 152mm Professional Magnetic PowerLok Impact Driver Bit Holder - SCP14150M, 1 x SabreCut Revolution 60mm Professional Magnetic PowerLok Impact Driver Bit Holder - SCP1460M, 5 x SabreCut Extreme 25mm Professional Impact Driver Bits - SCPZ225, 5 x SabreCut Extreme 25mm Professional Impact Driver Bits - SCPH225. Professional quality impact driver bits feature "torsion zones" which provide more impacting ability and allows impacting to be evenly dispersed throughout the accessory. The high torque technology used in our impact bits continues to meet the increasing demands of impact drills and drivers. Our proprietary heat treat process is strictly controlled to ensure the bit has optimal hardness for impact driving. This results in less breakage due to the flexibility in the torsion zones.