These Ball-Joints have broached, threaded studs which fit a 1/8" Allen Wrench. Use an Allen Wrench to thread the Ball-Joints closer to or farther from the sharpener's Vise to make micro-angle adjustments. Then use the Knurled Jam-Nut to lock the angle in place.
The 11" Degree Bar and Riser Block will extend the angle range to 13-35 degrees per side (26-70 degrees inclusive)
