... G=greyDigital Position indicatorSANKQ specialized in manufacturing professional with woodworking machine accessories more than 10years.such as ... indicators, bakelite handle and knob, lobe ball knObs with brass insert, long knobs,adjustable handle , zinc alloy ... handle, position gauge,gravity gauge,handwheel with gauge, dial , handwheel , hand wheel with indicators, indexing plunger, universal joints ...