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Hand drill

Also known as a bore drill. It is a tool that is used to make holes and openings. The most important variations are: - The bore drill: with a helical bevelled point and a revolving handle, which is used by hand to make small holes. - The percussion drill: to make large diameter and deep holes. - The arquimedian drill or brace: made up of a ?U' aped bar which is moved by one hand whilst pressure is made by the other hand.