Thread pitch gauge: high strength and high hardness, for making the surface pattern of a workpiece.. Metal roller: with fine workmanship, simple and very practical in use, easily win your favors.. Linear knurl wheel for tool: material: made of high grade steel for durability. high strength and hardness.. Replacement knurling wheel: craft, carefully down to every detail to give it a chic and beautiful look.. Dual wheel knurling tools: double twill direction: one is positive, the other is negative, fit for your needs..
