Trend GB12 Guide Bush 12mm The Trend GB12 is used to guide the router when using a template. It is attached to the base of the router and is designed to follow the contours of the template. Features: Fits directly to Trend T3,T4,T5,T5 MK2, T9,T10 and T11 as well as some other light duty routers Will fit other makes when used with GB/5, GB/PLATE or UNIBASE Sub-base Specification: Outside diameter: 12 mm Inner diameter: 9 mm Projects from plate: 6 mm Plate diameter: 60 mm Csk screw hole centres: 50 mm