45s had big holes, typically.so they required inserts to fit on the turntable's spindle. some had built-in plastic fitters, some just had small holes, but most had large holes to speed up production. so, inserts (plastic and metal) were made and sold. i have hundreds of the stupid things.
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postbear has metal knees,
Mon 30 Oct 2006, 0:38,
archived)
i believe they are called spidersi rather like them the 45s with big holes in them were pressed for juke boxes
(
amoebaboy chose for death by unga bunga on,
Mon 30 Oct 2006, 1:37,
archived)