Ultra Tool 560 Solid Carbide Combined Drill and Countersink, Uncoated Finish, 3/16" Body Diameter, 60 Degree, 2 Size (Pack of 1) Plain-style combined drill and countersink creates a 60-degree countersink, which can be used as a center hole for machine centers 118-degree conventional point drills a center hole while the two right-hand cutting flutes clear chips away to prevent clogging Solid carbide is harder than high-speed or cobalt steel and provides longer tool life at higher speeds Uncoated (bright) finish has no additional surface treatment or coating Double-ended to provide two cutting ends