Home / Milling / Mill Tooling / Boring Heads / Boring Head, 1″ Straight Shank, 3″, Criterion Boring Head, 1″ Straight Shank, 3″, Criterion$149.00 Category: Boring Heads Description Description Criterion 3″ Square Head Boring Head w/ 1″ Straight Shank takes 1″ Boring Bars Related products Boring Head Set, 3″, R-8 (NEW) Import, Item # GE65NBH-203S $158.95 Read more Boring Head, Straight Shank 5/8″, 1-7/8″ Diameter $59.00 Read more Arbor, Boring Head, 30 NMTB 1-1/2″ 18TPI $30.00 Read more Boring Head, R-8, Bridgeport, Diameter 3″, Item #L61043B $149.00 Read more