SQUARE ROLLING BOARDS
WEREN'T THEY CALLED """DOLLIES"""???
https://www.google.com/search?q=SQAURE+ROLLING+BOARDS&rlz=1C1CHBF_enUS890US890&oq=SQAURE+ROLLING+BOARDS&aqs=chrome..69i57.7336j0j7&sourceid=chrome&ie=UTF-8
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