Having the right sliding t-nuts and bolts are essential in order to really enjoy the power of your aluminum extrusion fence. We have a custom UHMW bearing glide that we had specially made to attach to the outfeed end of your aluminum extrusion fence. This provides a frictionless contact and protects your table saw top. We also have compact phenolic tall and extra tall auxiliary fences that attach using the sliding t-nuts to the aluminum extrusion channels. We only sell one tape measure, it reads both metric and inches. If you are making your own guide rails or just need a new tape, we highly recommend this Starrett steel tape measure with adhesive back.