There are several tasks on the table saw that are just safer to perform using a tall fence. Being able to clamp the workpiece to the fence, adds another measure of safety. That’s why I built the sliding tall fence you see in the photo. It’s sized to fit snugly over my existing rip fence, but still glide along the fence easily. I’ve found that this fence is a great help when cutting slots for splines, tenons, and a number of other cuts.