Single Flute H.S.S. Countersink SetFeatures：9pcs/set, each of :3/16", 1/4", 5/16", 3/8", 1/2", 5/8", 3/4", 7/8" & 1"Made of H.S.S. and precision groundItemDescription0245-0021Angle:60°0245-1029Angle:82°0245-2027Angle:90°

H.S.S. Countersink With 3/4" Weldon Shank, 3 FluteItemDescriptionCE82-0001Size(D):1",   d1:3/16", Shank(b):3/4", Oal(L):1-3/4", Angle:82°CE00-0001Size(D):1",   d1:3/16", Shank(b):3/4", Oal(L):1-3/4", Angle:90°CE00-0114Size(D):1-1/4",   d1:1/4", Shank(b):3/4", Oal(L):1-7/8", Angle:90°CE00-0112Size(D):1-1/2",   d1:5/16", Shank(b):3/4", Oal(L):2-1/16", Angle:90°CE00-0002Size(D):2",   d1:1/2", Shank(b):3/4", Oal(L):2-1/2", Angle:90°

6 Flute H.S.S. Machine  Countersinks SetFeatures:8pcs/set, each of :1/4 " , 5/16 " , 3/8 " , 1/2 " , 5/8 " , 3/4 " , 7/8 " & 1"Made of H.S.S. and precision groundItemDescription0206-0010Angle:60°0206-1018Angle:82°0206-2016Angle:90°

3pcs Indexable Countersink SetFeatures:● Positive rake for smooth cutting without chatter.● Carbide indexable eliminates tool resharpening.● No is tool resharpening needed.● Comes with insert.● 3pcs/set: 1/4", 1/2", & 1-1/4"● 1/4"-3/4" with a 1/2" shank use carbide     insert TCMT32.51● 1/2"- 1-3/4" with a 1/2" shank use carbide     inserts SCMT432● 1-1/4"- 2-1/2" with a 3/4" shank use carbide     inserts SCMT432CARBIDE INSERT, TiN COATEDItemDescription2124-1034TCMT32.512224-1058SCMT432CARBIDE INSERT CVD COATED, BPS101ItemDescription2224-1034TCMT32.51-MDItemSizeInsertInsertScrew0046-096060°TCMT32.51,SCMT432M4 x 100046-098282°TCMT32.51,SCMT432M5 x 120046-099090°TCMT32.51,SCMT432M5 x 12