21pcs H.S.S. Interchangeable Pilot Counterbore SetFeatures:Straight shank.14 pilots with a 5/32" shank including0.187, 0.204, 0.213, 0.229, 1/4, 17/64,9/32, 5/16, 21/64, 11/32, 3/8, 25/64,13/32 and 7/16. 6 counterbores including 5/16, 3/8, 7/16,1/2, 9/16 and 5/8.1 Holder with a 3/8" shank.Supplied in a fitted case.ItemDescription3620-012121pcs   H.S.S. Interchangeable Pilot Counterbore Set

Premium H.S.S. Solid Capscrew Counterbore Set, 7ps/set 3 Flute, Straight Shank●Item #509S-0007                                                   Size : (6#, 8#,10#, 1/4", 5/16", 3/8", 1/2")●Item #509S-007M                                                  Size : (M3, M4, M5, M6, M8, M10, M12) ItemDescription509S-0007Inch   Size : (6#, 8#,10#, 1/4", 5/16", 3/8", 1/2")509S-007MMetric   Size : (M3, M4, M5, M6, M8, M10, M12)

Counterbore SetFeatures:Complete with pilots in fitted case. Each set includes:13 counterbores-26 pilots Counterbores:1/4"to1"by 16ths Pilots:  1/8,5/32,3/16 and 1/4 with 3/32 shanks3/16,7/32,1/4,9/32 and 5/16 with 5/32 shanks,  1/4,5/16,3/8",7/16" and 1/2 with 3/16 shanks,  5/16,3/8,7/16,1/2,9/16 and 5/8 with 1/4 shank  3/8,7/16,1/2,9/16,5/8, and 3/4 with 5/16 shank Soild wood excellent packing Straight shank  ItemDescription500S-A000Each set includes: 13 counterbores-26 pilots

Ansi H.S.S. Reamer Straight Shank, Straight Flute, Right Hand CutDiameter Tolerance:Thru 1/4" diameter       +0.0001" to +0.0004"                                     -0.0000"Above 1/4" to 1"           +0.0001" to +0.0005"                                     -0.0000"Above 1" to 1-1/2"        +0.0002" to +0.0006"                                      -0.0000"Features:Standard 45º chambered cutting edge.Straight flute design.Bright finished.ItemDescriptionMetric-0400-50808.0mm0400-515015.0mm0400-516016.0mm0400-518018.0mm0400-520020.0mmInch-5015-00451/4"5015-02457/8"5015-02851"5015-03051-1/8"5015-03201-1/4"5015-03301-3/8"5015-03401-1/2"