12 Pc 3/4 Boring Bar Set 3 Inch Boring head Set W/ 1'' Shank Carbide Tipped. 12 Pc 3/4'' Boing Bars Included; 3 Size Bore Head With 1'' Shank; Boring Head Diameter: 3/4''; 1-1/2-18 (7/16) Boring Head Thread; Case Included. Unit Dim L x W x H (in): 13 x 10 x 3 Estimated. 12 Pc 3/4'' Boing Bars Included. 3 Size Bore Head With 1'' Shank.
1-1/2-18 (7/16) Boring Head Thread.