45 rpm adapter

The adapter may be a small solid circle that fits onto the spindle (meaning only one 45 could be played at a time) or a larger adapter that fits over the entire spindle of a record changer, permitting a stack of 45s to be played.

They were made of solid zinc, difficult to insert into a record, and almost impossible to remove without breaking the disc.

The EMI version is circular, with four small notches holding the center part onto the rest of the record.

Several manufacturers made "spider" adapters in slightly varying shapes and many different colors, though yellow and red were most frequently used.

[2] McLaughlan, a Boston area nightclub DJ, came up with the design to make 7" discs easier to handle when mixing.