Pro-Ject Record Puck PROStabilize your records Reduces unwanted resonances & improves playback of warped records. The label is protected by the felt pad on the underside. OPTIMIZED PLAYBACK OF YOUR RECORDS This Record Puck PRO ensures a firm fit between the record and the turntable. Record pucks use weight to secure a record against the turntable. This improves the sound performance of the turntable in terms of timing and sound depth.