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The compass, or keyhole, saw bears a narrow, tapered blade
in order for it to fit into narrow spaces. Some types come with three or four
alternative blades that can be replaced to meet the demands of the particular
cut: there could be ripsaw blades and blades for crosscut work. Due to its
flexibility, the compass saw is especially useful for cutting along curved
lines. This saw is also frequently used for short cuts, or to finish off a long
cut and for fine irregular sawing.