Angle Cutting Jig for Creating Tapered Cuts for Table and Radial Arm Saws complete with operating Instructions. The taper jig serves as an auxiliary movable guide which slides along the rip fence of table and radial arm saws. When you need to make that slightly angled cut (0 to 15 degrees) that is too long for your miter or chop saw, use the taper jig to make the job easier. This taper jig includes a built-in scale & is fully adjustable. Overall length is 23" with a 3" taper per foot.