DRILLCO - 7/8,MACHINE COUNTERSINK 82DEG 4 FLUTE - 38E156B

Four Flute Machine Countersinks have a longer shank to use in Turret lathes and for screw machine work.
most common angles for countersinking available; 60°, 82°, 90°
4 flutes for improved removal rate and surface finish
longer shank for use in turret lathes