Home / Milling / Mill Tooling / Boring Heads / Boring Head, 4″, Flynn Mfg., Shank Boring Head, 4″, Flynn Mfg., Shank$75.00 Category: Boring Heads Description Description Flynn Mfg. 4″ boring head w/ 50 taper Related products Boring Head, Automatic, 30 NMTB $149.00 Read more Boring Head, CAT 40, 3″ Diameter, Criterion, Item # L62340 $249.00 Read more Boring Head, Straight Shank, 1/2″, Diameter 1-1/2″ $24.00 Read more Boring Head, R-8 shank, Diameter 3″, Import $99.00 Read more