Pro-ject Anti-Skate Bias Weight (With nylon thread) Original replacement part. Suitable for all Pro-ject tonearms The Anti-Skate Weight is attached to a thin fishing wire that hoops onto the rear of most Pro-Ject tonearms and hangs over the Anti-Skate Hoop. This allows for the perfect amount of counter-drag on the tonearm (all tonearms have a natural side-ways momentum), reducing the inclination to skip or skate. *Please Note: This weight is supplied pre-attached to the fishing wire.