... auto screw feeder with counter 1,XY-901 with csrew counter function, adjustable orbit apply for disfferent screws(M1.0-5.0). auto ... screw feeder with counter Specifications: Model XY-901 Screw thread ... and endurable 4.Tsui up and down adjust with screw stem, more easier 5.Brush up and ... down adjust with screw stem, more easier 6.XY-901 is ...