Griffin Universal Ground Joint Reamer

Universal Ground Joint Reamer. This brass reamer is a 1 - 10 taper which has been machined to a +/-0.001" tolerance. This means when you ream a fitting it should be a nice snug joint connection with little effort. This universal reamer size range is just smaller than a 10mm fitting to just over a 19mm fitting at the widest point. Out individually sized joint forming reamers (used for making glass on glass female fittings) have been very popular and trusted for their effectiveness/accuracy.