Home / Milling / Mill Tooling / Boring Heads / Boring Head, R-8, Diameter 4″, 1″ Boring Bars, Criterion L624R8 Boring Head, R-8, Diameter 4″, 1″ Boring Bars, Criterion L624R8$349.00 SKU: L624R8 Category: Boring Heads Description Description Criterion 4″ Boring Head, 1″ Boring Bars, R-8 Shank, DBL-204 Related products Boring Head, R-8 3″ Square, 1″ Boring Bars Armstrong $149.00 Read more Boring Head, R-8 shank, Diameter 3″, Import $99.00 Read more Boring Head, R-8, Bridgeport, Diameter 3″, Bad Shank Item # L61043C $95.00 Read more Boring Head, R-8, Bridgeport, Diameter 2″, Item #L6101 $225.00 Read more