The Pacific Tool and Gauge Thread Protector threads onto the breech end of a Remington 700 barrel, protecting the barrel threads from harm during storage or when performing machining operations. Damaging a barrel's threads will make attachment to the receiver impossible, or at least result in a poor mating between the barrel and action and decreased accuracy. The PTG Thread Protector has a 1.075x16 TPI. FeaturesHigh Quality Aluminum Construction1.075x16 TPIPrecision Machined