ER-32 Indexing Spin Jig With Wrench ~ This indexing & grinding fixture uses ER-32 collets (range 1/16~13/16″) for better griping and accuracy. ~ Extends the capabilities of drill presses, surface grinders, gear cutters and milling machines. ~ Spindle hardened and ground with a .0005″ T.I.R.. ~ 10 vernier holes for 1° indexing. ~ 2″ spindle travel for flute grinding. ~ 5″ diameter index plate has a 36 hole circle and is graduated by 0 to 35 for direct indexing in 10° steps and is marked in 5° increments. ~ Spindle lock for tightening collet. ~ Center height is 2.75″. ~ Base footprint is 4.5 X 4″. ~ Ground parallel to spindle.