A drawbolt is the long screw or bolt that attaches the buttstocks on some 2-pc stocks such as Martinis and Sharps Borchardts and Ballards, also Remington 870s, 1100s and Win M12s.

This method is stronger than the upper-&-lower-tang attachment on many arms such as Parker, Fox and Smith doubles and Winchester lever rifles. Unless it's greatly strengthened at the wrist, the pictured wood will break under usage and IMO will be 3 times more likely to break if used on a tang-attached arm.
Regards, Joe

You can lead a man to logic but you can't make him think. NRA Life since 1976. God bless America!