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expansive bit[ek′span·siv ‚bit]
A bit in which the cutting blade can be set at various sizes.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
expansion bit, expansive bit
bit, of adjustable size, for cutting holes in wood. (See illustration p. 380.)A
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.