• Counter Bores - Allows the head of cap screws to be sunk beneath a surface
• Spot Face - Allows the head of a bolt to be sunk beneath the surface. This is basically a shallow counter bore.
• Counter Sink - Allows counter sunk head screws to be sunk beneath a surface.
• Center Drilling - Allows parts to be mounted between centers, on lathes typically.
• Tapers Holes - these holes can be cut using reamers.
• Threaded Holes - Taps can be used to add threads to holes
• High tolerance finishes for holes can be made with boring or reaming.