Home / Milling / Mill Tooling / Boring Head, 30 NMTB, Diameter 3-1/2″, Enco Boring Head, 30 NMTB, Diameter 3-1/2″, Enco$249.00 1 in stock Add to cart Category: Mill Tooling Description Description Enco 3-1/2″ Boring Head w/ 30 NMTB Shank, Takes 3/4″ Boring Bars Related products Boring Head, Straight Shank 1-1/2″, Diameter 2″, Criterion L62215S $149.00 Add to cart Quick Change Set,R-8, Enco Item # L5708 $295.00 Add to cart Boring Head, R-8, Diameter 4″, 1″ Boring Bars, Critereion L624R8 $349.00 Add to cart Boring Head, Staight Shank 1″, Diameter 1-3/4″, Erickson Tenthset (B) $75.00 Add to cart