These products are required for torque testing powered torque tools. A matching rundown adapter is already included with the DTT and DTS torque tester models, but you can purchase an extra one or a replacement from here.
Please choose the drive that matches the socket of the torque tester. You can also choose from the matching torque tester model. After selecting the drive, please choose the shank that fits with the tool bits' socket of your power tools.