brace head

brace head

[′brās ‚hed]
(engineering)
A cross handle attached at the top of a column of drill rods by means of which the rods and attached bit are turned after each drop in chop-and-wash operations while sinking a borehole through overburden. Also known as brace key.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Double Olympian marathon runner Steve Brace heads elite athletes who will run, cycle and swim the leek and said: "It was such an unusual thing to do and a great way to promote the beauty of Wales while raising awareness of food miles."
McColm hit a brace headed the ball past his own keeper, David Mitchell, and Currie coolly volleyed in.
The day after the Senior Bowl, Brace headed to Georgia where he's been holed up since.