Ozzistraightshooter Tap and Die set for common barrel muzzle thread 1/2 inch x 28 TPI.
 
This set includes a full 3 Tap set to make hand tapping easier and 
more precise.
Includes Starting, intermediate and bottoming taps.
Matching 1/2 x 28 SPLIT Die for barrel threading. SPLIT die allows 
you to create a more precise 
closer fitting thread.
 
1/2 inch x 28 TPI is a very popular thread used on many 22 cal rim-fire rifles.
 
These are top quality tools designed for professional use.