Trend STAIR/B Stair Jig B complete Open riser This template jig is a well proven means of routing out stair housings quickly and accurately.Constructed from hard wearing solid laminate and includes a reversible fence for exact matching of stair strings. Built-in heavy duty front clamp for quick clamping for each trench.Adjustable to suit private and common stair angle pitch. The jig incorporates a stub riser to conform with building regulations.All heavy duty routers over 1600 watts can be used.Sub-base is pre-drilled to suit Trend/DeWalt/Elu 1/2 inch routers, for other makes the sub-base will have to be redrilled. Please state make and model when ordering.Router not included.Specification-Thread thickness=32 mmRiser thickness=16 mmGuide bush diameter=24 mmlng.=585 mmHeight=485 mmWidth=9.5 mmWeight=6.3kg