... rotary or screw motion.Features:1) Four or five digital indicator 2) Four different viewing angles3) Axial pitch range ... shaft (inside diameter): Φ14mm, Φ20mm, Φ25mm, Φ30mm6) Color: O=orange, B=black, G=greyDetail description, please look it up ... professional with woodworking machine accessories more than 10years.such as digital position indicator, position indicators, indicators, bakelite handle and ...