The thread alignment tool is made of stainless steel for strength. Designed for 7.62 bore
Recommended barrel OD sizes for threading is 0.5431 min and 0.5501 max
Meets American National Standards Institute or ANSI standard
Top quality cutting tools for muzzle threading. This is a #5 die (1.5in OD or 38mm) for cutting muzzle threads to M14X1LH. Used to thread new barrels for flash suppressors or chase old threads