Profile: AllTorc is a supplier of industrial torque tools. We offer a full range of torque related products ranging from RAD torque systems, pneumatic/battery and electric pistol- grip style RAD Gun. We also offer torque wrenches, hydraulic wrenches & pumps, bolt tensioners, and impact guns. The A Drive is the hex link that the power head locks into, allowing it to fit onto hex nuts in low profile applications like well heads and BOP?s. The A Drive has a larger reaction area. There are no roll pins, just screws. Taking apart the drive for repair is simple?there is no need to pry it apart like other hex links. All the screws are the same hex wrench with uniform screws in all sizes of the drives.