Pro-Ject 'Classsic' 750gm Turntable Record Puck

The Record Puck Classic is the original Pro-Ject puck found on many of their original hi-end models, including the RPM10. The puck is made from brass and weighs in at 0.75kgm, and works in a similar way to a record clamp, only using the weight of the puck to "clamp" the record down onto the platter, as opposed to an actual record clamp, which is pushed onto the record and then tightened (clamped) to the spindle. 

This is a very high mass puck and may not be suitable for some suspended turntables due to its weight, it might also overly stress the bearings or drive systems of basic turntables not intended to support this sort of design (but it should be fine with most high quality non suspended turntables).