steel shaft 1high precision,high tensile 2material:carbon steel 3certificate:ISO9001:2008 4Quick delivery,wide application High tensile steel shaftFeature1)Material:iron,steel.stainless steel,carbon steel,HSS,2)surface ... treatment:hear treament,polishing,galvanized,electroplating,spraying3)processing machine:CNC lathe,grinding machine,milliing machine,drilling machine,wire ...