Trend Guide Bushes can be attached to the base of the Router and are designed to follow the contours of a template. The guide bush guides the router when using a template. It fits directly to Trend T3, T4, T5, T5 MK2, T9, T10 and T11 routers, and some other light duty routers. It will also fit other makes when used with GB/5, GB/PLATE or UNIBASE Sub-base. Key specifications: Outside diameter: 16mm, Inside diameter: 14mm, Projection from plate: 10mm.