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chain tongs[′chān ‚täŋz]
A tool for turning pipe, using a chain to encircle and grasp the pipe.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
chain pipe wrench, chain tongs
A plumber’s wrench for turning pipe, consisting of a lever arm which has sharp teeth that engage the pipe and a short, adjustable chain which is wrapped around the pipe and holds the pipe securely.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.