Router cutter HW with fitted base blade

Groove cutters with reversible carbide blades on an 8 mm shank, from 8 to 20 mm wide. The blade cuts on both the end and the side, so the cutter grooves and trims. Reversible blades change the economics: when an edge dulls you turn or replace a small insert rather than the whole cutter, the tool is never away being reground, and the diameter stays exactly what it was — which matters when the groove has to fit a panel.