1Ideal Application: The heavy duty 1/2?28 threading alignment tool is especially designed for .22/.223 diameter tube with exact match and stable performance. 2How to Work: The premium 1/2?28 threading alignment tool is professionally engineered to squarely guide the die onto the barrel of the pipe without damage. 3High Accuracy: The threading alignment tool comes with approximate 1.5in/3.81cm length, 1/2in threaded portion, 1in/2.54cm long bore side and is slightly under .22. 4Excellent Performance: Tat die starter eliminates the chance of crooked threading, making it easier to install flash hiders and other pipe mounted attachments requiring the pitch thread. 5Durable Construction: The threading alignment die starter is exquisitely manufactured by heavy duty stainless steel with high hardness, withstand all kinds of bad use environment.