# Sandbox.ModelHitboxBuilder.WithSurface

```csharp
ModelHitboxBuilder WithSurface(string surfaceName)
```

### Parameters

- `surfaceName` (`string`): The surface name.

### Returns

`ModelHitboxBuilder`

Declared in [Sandbox.ModelHitboxBuilder](/api/Sandbox.ModelHitboxBuilder).
Assembly: `Sandbox.Engine`.