AR Upper Receiver & Barrel Nut 1.250 inch x 18TPI UNF TAP, High speed steel
Ozzistraightshooter Tap 1 & 1/4 inch x 18 TPI UNF .For AR Upper Receiver & Barrel NutThread is 1 1/4 inch x 18 TPI UNF .
Top quality High speed steel.
Tap is perfect to cut receiver threads and barrel nut
These are top quality tools designed for professional use.