three steel cylindrical counterbores on white background

accessory accuracy background bit bits bolt borer boring closeup coaxial color counterbore counterbores countersink cutter cutters cutting cylindrical design detail drill drilling edge end endmill engineering equipment fluted geometry grooved group hard hardness hardware high hole hss industrial industry isolated machining macro manufacturing mechanical metal metallic mill milling nobody nopeople part precision processing quality rotate screw set sharp silver silvery single spare speed steel store supply technical technology tool tools turning twisted white whole working