Pro-Ject Audio Record Puck Classic - Vinyl Record Stablising WeightExtra weight on the spindle helps to hold records in place more effectively than the weight of the records alone, making it easier for the stylus to track the grooves accurately and produce a more detailed, more lively sound. The Record Puck is a heavy (750g) brass weight that will hold records firmly in place, with a felt base designed to be gentle on delicate record labels. Though the Record Puck can be used on any turntable with a non threaded