Receiver Mandrels - Trues action to bolt raceway rather than threads, which may not be aligned to action. Two sizes (.701" and .703") to fit actions with nominal .700" diameter raceways. Spare .703" mandrels available separately. Instructions included.
Big Book Catalog, Issue:73, Page:478
SPECS: Receiver Mandrels - Steel, hardened to Rc 45, in-the-white, 10" (25.4cm) long. .701" (17.80mm) and .703" (17.86mm) diameter. Fits nominal .700" diameter bolt action receivers.