steel shaft 1high precision,high tensile 2material:carbon steel 3certificate:ISO9001:2008 4Quick delivery, ... machine,wire-cutting machine,CNC bending machine.4)testing machine:caliper,digital height gauge,roughness tester,hardness tester.5)application:medical device ... )with high compression strength,anti-torsion capacibility.Product view Hign precision Crankshaft connecting rod ,shaft parts