Guide bush guides the router when using a template.

Fits directly to Trend T3,T4,T5,T5 MK2, T9,T10 and T11, and some other light duty routers.
Will fit other makes when used with GB/5, GB/PLATE or UNIBASE Sub-base.

Outside diameter: 12mm
Inside diameter: 9mm
Projection from plate: 6mm