12 Pc 3/4'' Shank Bore C6 Carbide Tip Boring Bar Set 12 PC Boring Bar Set ;C-6 Carbide Tipped Boring Bars have ground alloy steel Shank 50 RC Shank Diameter: 3/4";Minimum Boring Range: 5/16" - 11/16" Boring Depth Range: 3/4" - 3-3/4" ;Overall Length: 2-1/8" - 5-1/4" Quantity:1 ;Overall Storage Dimension: 3-1/2'' x 2-3/4" x 5-1/2"