HR 500 HR 500 Solid carbide high-performance reamers up to 20 mm NEW HR 500 G Carbide- or cermet-tipped high-performance reamers from 20 mm up to 40 mm HR 500 Alu Solid carbide high-performance reamers for the machining of aluminium and AlSi- alloys HR 500 ACTIVE Special range of solid carbide high-performance reamers Made by Guhring