Your TAT package contains three parts:
1. Threaded Bore Pilot (TAT)
2. Threading Die 
3. Die Handle 

Warning: Instructions are for right-hand threading.  For  left-hand threads, turn the opposite direction.

The TAT is simple to use.  Even for the inexperienced, the entire procedure should not take more than five to ten minutes. For your safety, follow these directions carefully:

1. Open the action on the rifle and be sure there is no ammunition in the magazine or the bore.
2. The threading die is split along one side and has screw to adjust the die cut for shallow or deep threads. Open up the die to cut shallow threads in order to start the initial threads on the rifle muzzle.
3. Install the threading die into the die handle. Begin with the large chamfered side facing the muzzle. Insert the die into the handle and tighten the retaining screws so that the die will not turn in the handle.
4. Locate the threaded bore pilot (TAT) and insert the pilot into the threaded die so that the pilot, or the unthreaded end, goes into the die from the side opposite the large chamfer. Turn the threaded bore pilot threads two full turns into the die. Use either your muzzle brake or your flash hider as a jam nut to hold the bore pilot in the die. Tighten firmly.
5. If you have assembled the TAT properly as described above, the die now has about three turns available to cut threads on the chamfer side of the die. The TAT is now ready to use.
6. Hold the barrel of your rifle firmly during the threading procedure. A good bench vice with padded jaws is desirable to hold the barrel. You can use soft wood blocks, sheet lead, or copper sheet as padding for the vice jaws.
7. Lubricate both the pilot and die inside of the muzzle with oil. Now insert the lubed pilot into the bore of the muzzle until the die contacts the muzzle. Grasp die handles in both hands and, using some pressure, rotate the handles in a clockwise direction. You will feel the die start to cut. Keep turning the handles slowly. There should be some resistance until the threading dies bottom out on the pilot (above three full turns).
8. WARNING: When you encounter any resistance, STOP! Do not go any further, remove the TAT, then continue threading. With proper threading, the TAT can last for years. Damaged die can be replaced at the regular price.
9. Leave the die attached to the muzzle. You have established a threading pattern that is both concentric and perpendicular to the bore. Loosen the muzzle brake or flash hider that served as a jam nut and remove the threaded pilot from the die. Grasp the die handle again with both hands, turn the handles clockwise until the die bottoms out against the front sight.
10. Now turn the die handles counter-clockwise and remove the die from the rifle muzzle. At this point, you have established the muzzle threads and all you have to do now is deepen the threads so the muzzle brake will screw on. The pilot is no longer necessary.
11. Remove the threading die from the handle and readjust the die a small amount so that the die will cut slightly deeper threads. Install the die back in the handle. Orient the die so that the side with the chamfer again faces the muzzle. Carefully start the die back on the established threads by turning the die handles clockwise. Continue turning the handles until the die bottoms out against the front sight. Unscrew the die.
12. Try to turn the muzzle brake onto the threads that you cut. If the brake will not start onto the treads, repeat Step # 10 above and try again. You want a good tight fit on the threads with some resistance. You may have to repeat the procedure several times.
13. STOP when you are able to turn the brake on the muzzle at least four or five turns with resistance. Remove the brake from the muzzle. Now take the die that is still installed in the handles and turn the die over. The side with the chamfer should be facing you now. Again, carefully start the die onto the established muzzle threads and turn the die handles clockwise until the die bottoms out against the front sight. Unscrew the die from the muzzle. You are now done threading. Clean any thread cutting from the muzzle threads with a soft wire brush and install the muzzle brake until the base butts against the front sight. Make the unit quite tight.