Graflex NanoBore fine-bore tooling by Seco Tools AB includes solid-carbide and indexablecarbide tools for internal machining of 0.012 to 0.315-in. diameters. Graflex's connection technology imparts low runout and high finish quality, while toolholders with coolant capability secure the indexable inserts. An axial-type, fine-boring head holds the tools and provides micrometer adjustments in 0.0004-in. increments and 0.0001-in. vernier adjustments.