Discs, such as those used in the production of buttons, can be cut rapidly with a bit of the type illustrated in figure II.11. Ring blanks can be drilled and cut in a single operation using a bit of the type shown in figure II.12. These two types of bit can be used with a hand drill or an electric drill.

Figure II.11: Bit used to cut discs

Figure II.12: Bit used to cut ring blanks