The self-reversing grn-nc tap holderstap from emuge corp holder is supplied for use on cnc machining centres. The self-reversing grn-nc tap holder tap holder accommodateshouses an integrated turning gear mechanism, which facilitatesassists automatic reversal through the tap holder rather than through the machine spindle. By through the process of eliminating elimination of spindle reverses, the the self-reversing grn-nc tap holdertap holder increasesenhances rpm capability, reduces lowers cycle times, reduces minimises spindle wear and maintenance, and produces provides energy savings by sustainingmaintaining an uninterruptedcontinuous current level.