Whoever said the folks at HIF didn't have a sense of humor? Their
"Louisiana Ding-Wop" is a solid brass weight, which may be attached to
the end ring of a measuring tape to hold it straight when performing a
tape-down. An adjustable collar allows the length of the weight to be
changed so the bottom of the weight is exactly 1 foot from the end of
the tape.
202-100 USGS Tape Weight 2.2 lbs.