Shandong Jining Qinfeng Machinery Hard ware Co. Ltd. Is a new high-tech private enterprise, specialized in producing high precison CNC machine tools and machine tool accessories. Since its foundation in 2000, Jining Qinfeng Machinery Hard ware Co. Ltd has successfully developed collet chucks,CNC tools and other accessories with high accuracy and high speed, such as ER collets(5μ/8μ),SK collets (5μ/8μ),EOC(OZ) collets(10μ/5μ),C-straight collets(10μ/5μ) and BT/SK(DIN69871)/CAT.HSK taper shank collet chucks, as well as other precision accessories.