Abstract: A guide for a manual rotary power tool having an end-mill type rotary cutter for mitering high pressure laminate structure, including a plate with a guide strip beneath and a recess along the guide strip proximate the plate for receiving the edge of laminate sheet to be mitered; articulated bracket structure with an angled flange for holding a rotary power tool adjustably in the axial direction of the cutter with the cutter located tangent to either end of the guide strip and plate or at an intermediate position therebetween, the articulated bracket structure including portions movable relative to each other in a plane parallel to the plate and fixed in position by a shim arrangement for translatory adjustment of the cutter to accommodate different laminate thicknesses; co-acting radius-guide structure for mitering is also disclosed.